Iyappan Subramanian | e6ad767 | 2014-08-07 15:14:28 -0700 | [diff] [blame] | 1 | /* Applied Micro X-Gene SoC Ethernet Driver |
| 2 | * |
| 3 | * Copyright (c) 2014, Applied Micro Circuits Corporation |
| 4 | * Authors: Iyappan Subramanian <isubramanian@apm.com> |
| 5 | * Ravi Patel <rapatel@apm.com> |
| 6 | * Keyur Chudgar <kchudgar@apm.com> |
| 7 | * |
| 8 | * This program is free software; you can redistribute it and/or modify it |
| 9 | * under the terms of the GNU General Public License as published by the |
| 10 | * Free Software Foundation; either version 2 of the License, or (at your |
| 11 | * option) any later version. |
| 12 | * |
| 13 | * This program is distributed in the hope that it will be useful, |
| 14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 16 | * GNU General Public License for more details. |
| 17 | * |
| 18 | * You should have received a copy of the GNU General Public License |
| 19 | * along with this program. If not, see <http://www.gnu.org/licenses/>. |
| 20 | */ |
| 21 | |
| 22 | #include "xgene_enet_main.h" |
| 23 | #include "xgene_enet_hw.h" |
Iyappan Subramanian | 32f784b | 2014-10-13 17:05:34 -0700 | [diff] [blame] | 24 | #include "xgene_enet_sgmac.h" |
Iyappan Subramanian | 0148d38 | 2014-10-09 18:32:06 -0700 | [diff] [blame] | 25 | #include "xgene_enet_xgmac.h" |
Iyappan Subramanian | e6ad767 | 2014-08-07 15:14:28 -0700 | [diff] [blame] | 26 | |
Feng Kan | de7b5b3d | 2015-01-06 15:41:33 -0700 | [diff] [blame] | 27 | #define RES_ENET_CSR 0 |
| 28 | #define RES_RING_CSR 1 |
| 29 | #define RES_RING_CMD 2 |
| 30 | |
Iyappan Subramanian | bc1b7c1 | 2015-04-28 13:52:39 -0700 | [diff] [blame] | 31 | static const struct of_device_id xgene_enet_of_match[]; |
Suman Tripathi | 0738c54 | 2015-06-23 14:47:14 +0530 | [diff] [blame] | 32 | static const struct acpi_device_id xgene_enet_acpi_match[]; |
Iyappan Subramanian | bc1b7c1 | 2015-04-28 13:52:39 -0700 | [diff] [blame] | 33 | |
Iyappan Subramanian | e6ad767 | 2014-08-07 15:14:28 -0700 | [diff] [blame] | 34 | static void xgene_enet_init_bufpool(struct xgene_enet_desc_ring *buf_pool) |
| 35 | { |
| 36 | struct xgene_enet_raw_desc16 *raw_desc; |
| 37 | int i; |
| 38 | |
| 39 | for (i = 0; i < buf_pool->slots; i++) { |
| 40 | raw_desc = &buf_pool->raw_desc16[i]; |
| 41 | |
| 42 | /* Hardware expects descriptor in little endian format */ |
| 43 | raw_desc->m0 = cpu_to_le64(i | |
| 44 | SET_VAL(FPQNUM, buf_pool->dst_ring_num) | |
| 45 | SET_VAL(STASH, 3)); |
| 46 | } |
| 47 | } |
| 48 | |
| 49 | static int xgene_enet_refill_bufpool(struct xgene_enet_desc_ring *buf_pool, |
| 50 | u32 nbuf) |
| 51 | { |
| 52 | struct sk_buff *skb; |
| 53 | struct xgene_enet_raw_desc16 *raw_desc; |
Iyappan Subramanian | 81cefb8 | 2015-04-28 13:52:37 -0700 | [diff] [blame] | 54 | struct xgene_enet_pdata *pdata; |
Iyappan Subramanian | e6ad767 | 2014-08-07 15:14:28 -0700 | [diff] [blame] | 55 | struct net_device *ndev; |
| 56 | struct device *dev; |
| 57 | dma_addr_t dma_addr; |
| 58 | u32 tail = buf_pool->tail; |
| 59 | u32 slots = buf_pool->slots - 1; |
| 60 | u16 bufdatalen, len; |
| 61 | int i; |
| 62 | |
| 63 | ndev = buf_pool->ndev; |
| 64 | dev = ndev_to_dev(buf_pool->ndev); |
Iyappan Subramanian | 81cefb8 | 2015-04-28 13:52:37 -0700 | [diff] [blame] | 65 | pdata = netdev_priv(ndev); |
Iyappan Subramanian | e6ad767 | 2014-08-07 15:14:28 -0700 | [diff] [blame] | 66 | bufdatalen = BUF_LEN_CODE_2K | (SKB_BUFFER_SIZE & GENMASK(11, 0)); |
| 67 | len = XGENE_ENET_MAX_MTU; |
| 68 | |
| 69 | for (i = 0; i < nbuf; i++) { |
| 70 | raw_desc = &buf_pool->raw_desc16[tail]; |
| 71 | |
| 72 | skb = netdev_alloc_skb_ip_align(ndev, len); |
| 73 | if (unlikely(!skb)) |
| 74 | return -ENOMEM; |
| 75 | buf_pool->rx_skb[tail] = skb; |
| 76 | |
| 77 | dma_addr = dma_map_single(dev, skb->data, len, DMA_FROM_DEVICE); |
| 78 | if (dma_mapping_error(dev, dma_addr)) { |
| 79 | netdev_err(ndev, "DMA mapping error\n"); |
| 80 | dev_kfree_skb_any(skb); |
| 81 | return -EINVAL; |
| 82 | } |
| 83 | |
| 84 | raw_desc->m1 = cpu_to_le64(SET_VAL(DATAADDR, dma_addr) | |
| 85 | SET_VAL(BUFDATALEN, bufdatalen) | |
| 86 | SET_BIT(COHERENT)); |
| 87 | tail = (tail + 1) & slots; |
| 88 | } |
| 89 | |
Iyappan Subramanian | 81cefb8 | 2015-04-28 13:52:37 -0700 | [diff] [blame] | 90 | pdata->ring_ops->wr_cmd(buf_pool, nbuf); |
Iyappan Subramanian | e6ad767 | 2014-08-07 15:14:28 -0700 | [diff] [blame] | 91 | buf_pool->tail = tail; |
| 92 | |
| 93 | return 0; |
| 94 | } |
| 95 | |
| 96 | static u16 xgene_enet_dst_ring_num(struct xgene_enet_desc_ring *ring) |
| 97 | { |
| 98 | struct xgene_enet_pdata *pdata = netdev_priv(ring->ndev); |
| 99 | |
| 100 | return ((u16)pdata->rm << 10) | ring->num; |
| 101 | } |
| 102 | |
| 103 | static u8 xgene_enet_hdr_len(const void *data) |
| 104 | { |
| 105 | const struct ethhdr *eth = data; |
| 106 | |
| 107 | return (eth->h_proto == htons(ETH_P_8021Q)) ? VLAN_ETH_HLEN : ETH_HLEN; |
| 108 | } |
| 109 | |
Iyappan Subramanian | e6ad767 | 2014-08-07 15:14:28 -0700 | [diff] [blame] | 110 | static void xgene_enet_delete_bufpool(struct xgene_enet_desc_ring *buf_pool) |
| 111 | { |
Iyappan Subramanian | 81cefb8 | 2015-04-28 13:52:37 -0700 | [diff] [blame] | 112 | struct xgene_enet_pdata *pdata = netdev_priv(buf_pool->ndev); |
Iyappan Subramanian | e6ad767 | 2014-08-07 15:14:28 -0700 | [diff] [blame] | 113 | struct xgene_enet_raw_desc16 *raw_desc; |
| 114 | u32 slots = buf_pool->slots - 1; |
| 115 | u32 tail = buf_pool->tail; |
| 116 | u32 userinfo; |
| 117 | int i, len; |
| 118 | |
Iyappan Subramanian | 81cefb8 | 2015-04-28 13:52:37 -0700 | [diff] [blame] | 119 | len = pdata->ring_ops->len(buf_pool); |
Iyappan Subramanian | e6ad767 | 2014-08-07 15:14:28 -0700 | [diff] [blame] | 120 | for (i = 0; i < len; i++) { |
| 121 | tail = (tail - 1) & slots; |
| 122 | raw_desc = &buf_pool->raw_desc16[tail]; |
| 123 | |
| 124 | /* Hardware stores descriptor in little endian format */ |
| 125 | userinfo = GET_VAL(USERINFO, le64_to_cpu(raw_desc->m0)); |
| 126 | dev_kfree_skb_any(buf_pool->rx_skb[userinfo]); |
| 127 | } |
| 128 | |
Iyappan Subramanian | 81cefb8 | 2015-04-28 13:52:37 -0700 | [diff] [blame] | 129 | pdata->ring_ops->wr_cmd(buf_pool, -len); |
Iyappan Subramanian | e6ad767 | 2014-08-07 15:14:28 -0700 | [diff] [blame] | 130 | buf_pool->tail = tail; |
| 131 | } |
| 132 | |
| 133 | static irqreturn_t xgene_enet_rx_irq(const int irq, void *data) |
| 134 | { |
| 135 | struct xgene_enet_desc_ring *rx_ring = data; |
| 136 | |
| 137 | if (napi_schedule_prep(&rx_ring->napi)) { |
| 138 | disable_irq_nosync(irq); |
| 139 | __napi_schedule(&rx_ring->napi); |
| 140 | } |
| 141 | |
| 142 | return IRQ_HANDLED; |
| 143 | } |
| 144 | |
| 145 | static int xgene_enet_tx_completion(struct xgene_enet_desc_ring *cp_ring, |
| 146 | struct xgene_enet_raw_desc *raw_desc) |
| 147 | { |
| 148 | struct sk_buff *skb; |
| 149 | struct device *dev; |
Iyappan Subramanian | 9b00eb4 | 2015-08-26 11:48:06 -0700 | [diff] [blame] | 150 | skb_frag_t *frag; |
| 151 | dma_addr_t *frag_dma_addr; |
Iyappan Subramanian | e6ad767 | 2014-08-07 15:14:28 -0700 | [diff] [blame] | 152 | u16 skb_index; |
| 153 | u8 status; |
Iyappan Subramanian | 9b00eb4 | 2015-08-26 11:48:06 -0700 | [diff] [blame] | 154 | int i, ret = 0; |
Iyappan Subramanian | e6ad767 | 2014-08-07 15:14:28 -0700 | [diff] [blame] | 155 | |
| 156 | skb_index = GET_VAL(USERINFO, le64_to_cpu(raw_desc->m0)); |
| 157 | skb = cp_ring->cp_skb[skb_index]; |
Iyappan Subramanian | 9b00eb4 | 2015-08-26 11:48:06 -0700 | [diff] [blame] | 158 | frag_dma_addr = &cp_ring->frag_dma_addr[skb_index * MAX_SKB_FRAGS]; |
Iyappan Subramanian | e6ad767 | 2014-08-07 15:14:28 -0700 | [diff] [blame] | 159 | |
| 160 | dev = ndev_to_dev(cp_ring->ndev); |
| 161 | dma_unmap_single(dev, GET_VAL(DATAADDR, le64_to_cpu(raw_desc->m1)), |
Iyappan Subramanian | 9b00eb4 | 2015-08-26 11:48:06 -0700 | [diff] [blame] | 162 | skb_headlen(skb), |
Iyappan Subramanian | e6ad767 | 2014-08-07 15:14:28 -0700 | [diff] [blame] | 163 | DMA_TO_DEVICE); |
| 164 | |
Iyappan Subramanian | 9b00eb4 | 2015-08-26 11:48:06 -0700 | [diff] [blame] | 165 | for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) { |
| 166 | frag = &skb_shinfo(skb)->frags[i]; |
| 167 | dma_unmap_page(dev, frag_dma_addr[i], skb_frag_size(frag), |
| 168 | DMA_TO_DEVICE); |
| 169 | } |
| 170 | |
Iyappan Subramanian | e6ad767 | 2014-08-07 15:14:28 -0700 | [diff] [blame] | 171 | /* Checking for error */ |
| 172 | status = GET_VAL(LERR, le64_to_cpu(raw_desc->m0)); |
| 173 | if (unlikely(status > 2)) { |
| 174 | xgene_enet_parse_error(cp_ring, netdev_priv(cp_ring->ndev), |
| 175 | status); |
| 176 | ret = -EIO; |
| 177 | } |
| 178 | |
| 179 | if (likely(skb)) { |
| 180 | dev_kfree_skb_any(skb); |
| 181 | } else { |
| 182 | netdev_err(cp_ring->ndev, "completion skb is NULL\n"); |
| 183 | ret = -EIO; |
| 184 | } |
| 185 | |
| 186 | return ret; |
| 187 | } |
| 188 | |
| 189 | static u64 xgene_enet_work_msg(struct sk_buff *skb) |
| 190 | { |
Iyappan Subramanian | 9b00eb4 | 2015-08-26 11:48:06 -0700 | [diff] [blame] | 191 | struct net_device *ndev = skb->dev; |
| 192 | struct xgene_enet_pdata *pdata = netdev_priv(ndev); |
Iyappan Subramanian | e6ad767 | 2014-08-07 15:14:28 -0700 | [diff] [blame] | 193 | struct iphdr *iph; |
Iyappan Subramanian | 9b00eb4 | 2015-08-26 11:48:06 -0700 | [diff] [blame] | 194 | u8 l3hlen = 0, l4hlen = 0; |
| 195 | u8 ethhdr, proto = 0, csum_enable = 0; |
| 196 | u64 hopinfo = 0; |
| 197 | u32 hdr_len, mss = 0; |
| 198 | u32 i, len, nr_frags; |
| 199 | |
| 200 | ethhdr = xgene_enet_hdr_len(skb->data); |
Iyappan Subramanian | e6ad767 | 2014-08-07 15:14:28 -0700 | [diff] [blame] | 201 | |
| 202 | if (unlikely(skb->protocol != htons(ETH_P_IP)) && |
| 203 | unlikely(skb->protocol != htons(ETH_P_8021Q))) |
| 204 | goto out; |
| 205 | |
| 206 | if (unlikely(!(skb->dev->features & NETIF_F_IP_CSUM))) |
| 207 | goto out; |
| 208 | |
| 209 | iph = ip_hdr(skb); |
| 210 | if (unlikely(ip_is_fragment(iph))) |
| 211 | goto out; |
| 212 | |
| 213 | if (likely(iph->protocol == IPPROTO_TCP)) { |
| 214 | l4hlen = tcp_hdrlen(skb) >> 2; |
| 215 | csum_enable = 1; |
| 216 | proto = TSO_IPPROTO_TCP; |
Iyappan Subramanian | 9b00eb4 | 2015-08-26 11:48:06 -0700 | [diff] [blame] | 217 | if (ndev->features & NETIF_F_TSO) { |
| 218 | hdr_len = ethhdr + ip_hdrlen(skb) + tcp_hdrlen(skb); |
| 219 | mss = skb_shinfo(skb)->gso_size; |
| 220 | |
| 221 | if (skb_is_nonlinear(skb)) { |
| 222 | len = skb_headlen(skb); |
| 223 | nr_frags = skb_shinfo(skb)->nr_frags; |
| 224 | |
| 225 | for (i = 0; i < 2 && i < nr_frags; i++) |
| 226 | len += skb_shinfo(skb)->frags[i].size; |
| 227 | |
| 228 | /* HW requires header must reside in 3 buffer */ |
| 229 | if (unlikely(hdr_len > len)) { |
| 230 | if (skb_linearize(skb)) |
| 231 | return 0; |
| 232 | } |
| 233 | } |
| 234 | |
| 235 | if (!mss || ((skb->len - hdr_len) <= mss)) |
| 236 | goto out; |
| 237 | |
| 238 | if (mss != pdata->mss) { |
| 239 | pdata->mss = mss; |
| 240 | pdata->mac_ops->set_mss(pdata); |
| 241 | } |
| 242 | hopinfo |= SET_BIT(ET); |
| 243 | } |
Iyappan Subramanian | e6ad767 | 2014-08-07 15:14:28 -0700 | [diff] [blame] | 244 | } else if (iph->protocol == IPPROTO_UDP) { |
| 245 | l4hlen = UDP_HDR_SIZE; |
| 246 | csum_enable = 1; |
| 247 | } |
| 248 | out: |
| 249 | l3hlen = ip_hdrlen(skb) >> 2; |
Iyappan Subramanian | 9b00eb4 | 2015-08-26 11:48:06 -0700 | [diff] [blame] | 250 | hopinfo |= SET_VAL(TCPHDR, l4hlen) | |
Iyappan Subramanian | e6ad767 | 2014-08-07 15:14:28 -0700 | [diff] [blame] | 251 | SET_VAL(IPHDR, l3hlen) | |
| 252 | SET_VAL(ETHHDR, ethhdr) | |
| 253 | SET_VAL(EC, csum_enable) | |
| 254 | SET_VAL(IS, proto) | |
| 255 | SET_BIT(IC) | |
| 256 | SET_BIT(TYPE_ETH_WORK_MESSAGE); |
| 257 | |
| 258 | return hopinfo; |
| 259 | } |
| 260 | |
Iyappan Subramanian | 949c40b | 2015-08-26 11:48:05 -0700 | [diff] [blame] | 261 | static u16 xgene_enet_encode_len(u16 len) |
| 262 | { |
| 263 | return (len == BUFLEN_16K) ? 0 : len; |
| 264 | } |
| 265 | |
Iyappan Subramanian | 9b00eb4 | 2015-08-26 11:48:06 -0700 | [diff] [blame] | 266 | static void xgene_set_addr_len(__le64 *desc, u32 idx, dma_addr_t addr, u32 len) |
| 267 | { |
| 268 | desc[idx ^ 1] = cpu_to_le64(SET_VAL(DATAADDR, addr) | |
| 269 | SET_VAL(BUFDATALEN, len)); |
| 270 | } |
| 271 | |
| 272 | static __le64 *xgene_enet_get_exp_bufs(struct xgene_enet_desc_ring *ring) |
| 273 | { |
| 274 | __le64 *exp_bufs; |
| 275 | |
| 276 | exp_bufs = &ring->exp_bufs[ring->exp_buf_tail * MAX_EXP_BUFFS]; |
| 277 | memset(exp_bufs, 0, sizeof(__le64) * MAX_EXP_BUFFS); |
| 278 | ring->exp_buf_tail = (ring->exp_buf_tail + 1) & ((ring->slots / 2) - 1); |
| 279 | |
| 280 | return exp_bufs; |
| 281 | } |
| 282 | |
| 283 | static dma_addr_t *xgene_get_frag_dma_array(struct xgene_enet_desc_ring *ring) |
| 284 | { |
| 285 | return &ring->cp_ring->frag_dma_addr[ring->tail * MAX_SKB_FRAGS]; |
| 286 | } |
| 287 | |
Iyappan Subramanian | e6ad767 | 2014-08-07 15:14:28 -0700 | [diff] [blame] | 288 | static int xgene_enet_setup_tx_desc(struct xgene_enet_desc_ring *tx_ring, |
| 289 | struct sk_buff *skb) |
| 290 | { |
| 291 | struct device *dev = ndev_to_dev(tx_ring->ndev); |
| 292 | struct xgene_enet_raw_desc *raw_desc; |
Iyappan Subramanian | 9b00eb4 | 2015-08-26 11:48:06 -0700 | [diff] [blame] | 293 | __le64 *exp_desc = NULL, *exp_bufs = NULL; |
| 294 | dma_addr_t dma_addr, pbuf_addr, *frag_dma_addr; |
| 295 | skb_frag_t *frag; |
Iyappan Subramanian | e6ad767 | 2014-08-07 15:14:28 -0700 | [diff] [blame] | 296 | u16 tail = tx_ring->tail; |
| 297 | u64 hopinfo; |
Iyappan Subramanian | 949c40b | 2015-08-26 11:48:05 -0700 | [diff] [blame] | 298 | u32 len, hw_len; |
Iyappan Subramanian | 9b00eb4 | 2015-08-26 11:48:06 -0700 | [diff] [blame] | 299 | u8 ll = 0, nv = 0, idx = 0; |
| 300 | bool split = false; |
| 301 | u32 size, offset, ell_bytes = 0; |
| 302 | u32 i, fidx, nr_frags, count = 1; |
Iyappan Subramanian | e6ad767 | 2014-08-07 15:14:28 -0700 | [diff] [blame] | 303 | |
| 304 | raw_desc = &tx_ring->raw_desc[tail]; |
Iyappan Subramanian | 9b00eb4 | 2015-08-26 11:48:06 -0700 | [diff] [blame] | 305 | tail = (tail + 1) & (tx_ring->slots - 1); |
Iyappan Subramanian | e6ad767 | 2014-08-07 15:14:28 -0700 | [diff] [blame] | 306 | memset(raw_desc, 0, sizeof(struct xgene_enet_raw_desc)); |
| 307 | |
Iyappan Subramanian | 9b00eb4 | 2015-08-26 11:48:06 -0700 | [diff] [blame] | 308 | hopinfo = xgene_enet_work_msg(skb); |
| 309 | if (!hopinfo) |
| 310 | return -EINVAL; |
| 311 | raw_desc->m3 = cpu_to_le64(SET_VAL(HENQNUM, tx_ring->dst_ring_num) | |
| 312 | hopinfo); |
| 313 | |
Iyappan Subramanian | 949c40b | 2015-08-26 11:48:05 -0700 | [diff] [blame] | 314 | len = skb_headlen(skb); |
| 315 | hw_len = xgene_enet_encode_len(len); |
| 316 | |
| 317 | dma_addr = dma_map_single(dev, skb->data, len, DMA_TO_DEVICE); |
Iyappan Subramanian | e6ad767 | 2014-08-07 15:14:28 -0700 | [diff] [blame] | 318 | if (dma_mapping_error(dev, dma_addr)) { |
| 319 | netdev_err(tx_ring->ndev, "DMA mapping error\n"); |
| 320 | return -EINVAL; |
| 321 | } |
| 322 | |
| 323 | /* Hardware expects descriptor in little endian format */ |
Iyappan Subramanian | e6ad767 | 2014-08-07 15:14:28 -0700 | [diff] [blame] | 324 | raw_desc->m1 = cpu_to_le64(SET_VAL(DATAADDR, dma_addr) | |
Iyappan Subramanian | 949c40b | 2015-08-26 11:48:05 -0700 | [diff] [blame] | 325 | SET_VAL(BUFDATALEN, hw_len) | |
Iyappan Subramanian | e6ad767 | 2014-08-07 15:14:28 -0700 | [diff] [blame] | 326 | SET_BIT(COHERENT)); |
Iyappan Subramanian | 949c40b | 2015-08-26 11:48:05 -0700 | [diff] [blame] | 327 | |
Iyappan Subramanian | 9b00eb4 | 2015-08-26 11:48:06 -0700 | [diff] [blame] | 328 | if (!skb_is_nonlinear(skb)) |
| 329 | goto out; |
Iyappan Subramanian | e6ad767 | 2014-08-07 15:14:28 -0700 | [diff] [blame] | 330 | |
Iyappan Subramanian | 9b00eb4 | 2015-08-26 11:48:06 -0700 | [diff] [blame] | 331 | /* scatter gather */ |
| 332 | nv = 1; |
| 333 | exp_desc = (void *)&tx_ring->raw_desc[tail]; |
Iyappan Subramanian | 949c40b | 2015-08-26 11:48:05 -0700 | [diff] [blame] | 334 | tail = (tail + 1) & (tx_ring->slots - 1); |
Iyappan Subramanian | 9b00eb4 | 2015-08-26 11:48:06 -0700 | [diff] [blame] | 335 | memset(exp_desc, 0, sizeof(struct xgene_enet_raw_desc)); |
| 336 | |
| 337 | nr_frags = skb_shinfo(skb)->nr_frags; |
| 338 | for (i = nr_frags; i < 4 ; i++) |
| 339 | exp_desc[i ^ 1] = cpu_to_le64(LAST_BUFFER); |
| 340 | |
| 341 | frag_dma_addr = xgene_get_frag_dma_array(tx_ring); |
| 342 | |
| 343 | for (i = 0, fidx = 0; split || (fidx < nr_frags); i++) { |
| 344 | if (!split) { |
| 345 | frag = &skb_shinfo(skb)->frags[fidx]; |
| 346 | size = skb_frag_size(frag); |
| 347 | offset = 0; |
| 348 | |
| 349 | pbuf_addr = skb_frag_dma_map(dev, frag, 0, size, |
| 350 | DMA_TO_DEVICE); |
| 351 | if (dma_mapping_error(dev, pbuf_addr)) |
| 352 | return -EINVAL; |
| 353 | |
| 354 | frag_dma_addr[fidx] = pbuf_addr; |
| 355 | fidx++; |
| 356 | |
| 357 | if (size > BUFLEN_16K) |
| 358 | split = true; |
| 359 | } |
| 360 | |
| 361 | if (size > BUFLEN_16K) { |
| 362 | len = BUFLEN_16K; |
| 363 | size -= BUFLEN_16K; |
| 364 | } else { |
| 365 | len = size; |
| 366 | split = false; |
| 367 | } |
| 368 | |
| 369 | dma_addr = pbuf_addr + offset; |
| 370 | hw_len = xgene_enet_encode_len(len); |
| 371 | |
| 372 | switch (i) { |
| 373 | case 0: |
| 374 | case 1: |
| 375 | case 2: |
| 376 | xgene_set_addr_len(exp_desc, i, dma_addr, hw_len); |
| 377 | break; |
| 378 | case 3: |
| 379 | if (split || (fidx != nr_frags)) { |
| 380 | exp_bufs = xgene_enet_get_exp_bufs(tx_ring); |
| 381 | xgene_set_addr_len(exp_bufs, idx, dma_addr, |
| 382 | hw_len); |
| 383 | idx++; |
| 384 | ell_bytes += len; |
| 385 | } else { |
| 386 | xgene_set_addr_len(exp_desc, i, dma_addr, |
| 387 | hw_len); |
| 388 | } |
| 389 | break; |
| 390 | default: |
| 391 | xgene_set_addr_len(exp_bufs, idx, dma_addr, hw_len); |
| 392 | idx++; |
| 393 | ell_bytes += len; |
| 394 | break; |
| 395 | } |
| 396 | |
| 397 | if (split) |
| 398 | offset += BUFLEN_16K; |
| 399 | } |
| 400 | count++; |
| 401 | |
| 402 | if (idx) { |
| 403 | ll = 1; |
| 404 | dma_addr = dma_map_single(dev, exp_bufs, |
| 405 | sizeof(u64) * MAX_EXP_BUFFS, |
| 406 | DMA_TO_DEVICE); |
| 407 | if (dma_mapping_error(dev, dma_addr)) { |
| 408 | dev_kfree_skb_any(skb); |
| 409 | return -EINVAL; |
| 410 | } |
| 411 | i = ell_bytes >> LL_BYTES_LSB_LEN; |
| 412 | exp_desc[2] = cpu_to_le64(SET_VAL(DATAADDR, dma_addr) | |
| 413 | SET_VAL(LL_BYTES_MSB, i) | |
| 414 | SET_VAL(LL_LEN, idx)); |
| 415 | raw_desc->m2 = cpu_to_le64(SET_VAL(LL_BYTES_LSB, ell_bytes)); |
| 416 | } |
| 417 | |
| 418 | out: |
| 419 | raw_desc->m0 = cpu_to_le64(SET_VAL(LL, ll) | SET_VAL(NV, nv) | |
| 420 | SET_VAL(USERINFO, tx_ring->tail)); |
| 421 | tx_ring->cp_ring->cp_skb[tx_ring->tail] = skb; |
Iyappan Subramanian | 949c40b | 2015-08-26 11:48:05 -0700 | [diff] [blame] | 422 | tx_ring->tail = tail; |
| 423 | |
| 424 | return count; |
Iyappan Subramanian | e6ad767 | 2014-08-07 15:14:28 -0700 | [diff] [blame] | 425 | } |
| 426 | |
| 427 | static netdev_tx_t xgene_enet_start_xmit(struct sk_buff *skb, |
| 428 | struct net_device *ndev) |
| 429 | { |
| 430 | struct xgene_enet_pdata *pdata = netdev_priv(ndev); |
| 431 | struct xgene_enet_desc_ring *tx_ring = pdata->tx_ring; |
| 432 | struct xgene_enet_desc_ring *cp_ring = tx_ring->cp_ring; |
| 433 | u32 tx_level, cq_level; |
Iyappan Subramanian | 949c40b | 2015-08-26 11:48:05 -0700 | [diff] [blame] | 434 | int count; |
Iyappan Subramanian | e6ad767 | 2014-08-07 15:14:28 -0700 | [diff] [blame] | 435 | |
Iyappan Subramanian | 81cefb8 | 2015-04-28 13:52:37 -0700 | [diff] [blame] | 436 | tx_level = pdata->ring_ops->len(tx_ring); |
| 437 | cq_level = pdata->ring_ops->len(cp_ring); |
Iyappan Subramanian | e6ad767 | 2014-08-07 15:14:28 -0700 | [diff] [blame] | 438 | if (unlikely(tx_level > pdata->tx_qcnt_hi || |
| 439 | cq_level > pdata->cp_qcnt_hi)) { |
| 440 | netif_stop_queue(ndev); |
| 441 | return NETDEV_TX_BUSY; |
| 442 | } |
| 443 | |
Iyappan Subramanian | 9b00eb4 | 2015-08-26 11:48:06 -0700 | [diff] [blame] | 444 | if (skb_padto(skb, XGENE_MIN_ENET_FRAME_SIZE)) |
| 445 | return NETDEV_TX_OK; |
| 446 | |
Iyappan Subramanian | 949c40b | 2015-08-26 11:48:05 -0700 | [diff] [blame] | 447 | count = xgene_enet_setup_tx_desc(tx_ring, skb); |
| 448 | if (count <= 0) { |
Iyappan Subramanian | e6ad767 | 2014-08-07 15:14:28 -0700 | [diff] [blame] | 449 | dev_kfree_skb_any(skb); |
| 450 | return NETDEV_TX_OK; |
| 451 | } |
| 452 | |
Iyappan Subramanian | 949c40b | 2015-08-26 11:48:05 -0700 | [diff] [blame] | 453 | pdata->ring_ops->wr_cmd(tx_ring, count); |
Iyappan Subramanian | e6ad767 | 2014-08-07 15:14:28 -0700 | [diff] [blame] | 454 | skb_tx_timestamp(skb); |
Iyappan Subramanian | e6ad767 | 2014-08-07 15:14:28 -0700 | [diff] [blame] | 455 | |
| 456 | pdata->stats.tx_packets++; |
| 457 | pdata->stats.tx_bytes += skb->len; |
| 458 | |
| 459 | return NETDEV_TX_OK; |
| 460 | } |
| 461 | |
| 462 | static void xgene_enet_skip_csum(struct sk_buff *skb) |
| 463 | { |
| 464 | struct iphdr *iph = ip_hdr(skb); |
| 465 | |
| 466 | if (!ip_is_fragment(iph) || |
| 467 | (iph->protocol != IPPROTO_TCP && iph->protocol != IPPROTO_UDP)) { |
| 468 | skb->ip_summed = CHECKSUM_UNNECESSARY; |
| 469 | } |
| 470 | } |
| 471 | |
| 472 | static int xgene_enet_rx_frame(struct xgene_enet_desc_ring *rx_ring, |
| 473 | struct xgene_enet_raw_desc *raw_desc) |
| 474 | { |
| 475 | struct net_device *ndev; |
| 476 | struct xgene_enet_pdata *pdata; |
| 477 | struct device *dev; |
| 478 | struct xgene_enet_desc_ring *buf_pool; |
| 479 | u32 datalen, skb_index; |
| 480 | struct sk_buff *skb; |
| 481 | u8 status; |
| 482 | int ret = 0; |
| 483 | |
| 484 | ndev = rx_ring->ndev; |
| 485 | pdata = netdev_priv(ndev); |
| 486 | dev = ndev_to_dev(rx_ring->ndev); |
| 487 | buf_pool = rx_ring->buf_pool; |
| 488 | |
| 489 | dma_unmap_single(dev, GET_VAL(DATAADDR, le64_to_cpu(raw_desc->m1)), |
| 490 | XGENE_ENET_MAX_MTU, DMA_FROM_DEVICE); |
| 491 | skb_index = GET_VAL(USERINFO, le64_to_cpu(raw_desc->m0)); |
| 492 | skb = buf_pool->rx_skb[skb_index]; |
| 493 | |
| 494 | /* checking for error */ |
| 495 | status = GET_VAL(LERR, le64_to_cpu(raw_desc->m0)); |
| 496 | if (unlikely(status > 2)) { |
| 497 | dev_kfree_skb_any(skb); |
| 498 | xgene_enet_parse_error(rx_ring, netdev_priv(rx_ring->ndev), |
| 499 | status); |
| 500 | pdata->stats.rx_dropped++; |
| 501 | ret = -EIO; |
| 502 | goto out; |
| 503 | } |
| 504 | |
| 505 | /* strip off CRC as HW isn't doing this */ |
| 506 | datalen = GET_VAL(BUFDATALEN, le64_to_cpu(raw_desc->m1)); |
Iyappan Subramanian | 9b00eb4 | 2015-08-26 11:48:06 -0700 | [diff] [blame] | 507 | datalen = (datalen & DATALEN_MASK) - 4; |
Iyappan Subramanian | e6ad767 | 2014-08-07 15:14:28 -0700 | [diff] [blame] | 508 | prefetch(skb->data - NET_IP_ALIGN); |
| 509 | skb_put(skb, datalen); |
| 510 | |
| 511 | skb_checksum_none_assert(skb); |
| 512 | skb->protocol = eth_type_trans(skb, ndev); |
| 513 | if (likely((ndev->features & NETIF_F_IP_CSUM) && |
| 514 | skb->protocol == htons(ETH_P_IP))) { |
| 515 | xgene_enet_skip_csum(skb); |
| 516 | } |
| 517 | |
| 518 | pdata->stats.rx_packets++; |
| 519 | pdata->stats.rx_bytes += datalen; |
| 520 | napi_gro_receive(&rx_ring->napi, skb); |
| 521 | out: |
| 522 | if (--rx_ring->nbufpool == 0) { |
| 523 | ret = xgene_enet_refill_bufpool(buf_pool, NUM_BUFPOOL); |
| 524 | rx_ring->nbufpool = NUM_BUFPOOL; |
| 525 | } |
| 526 | |
| 527 | return ret; |
| 528 | } |
| 529 | |
| 530 | static bool is_rx_desc(struct xgene_enet_raw_desc *raw_desc) |
| 531 | { |
| 532 | return GET_VAL(FPQNUM, le64_to_cpu(raw_desc->m0)) ? true : false; |
| 533 | } |
| 534 | |
| 535 | static int xgene_enet_process_ring(struct xgene_enet_desc_ring *ring, |
| 536 | int budget) |
| 537 | { |
| 538 | struct xgene_enet_pdata *pdata = netdev_priv(ring->ndev); |
Iyappan Subramanian | 9b00eb4 | 2015-08-26 11:48:06 -0700 | [diff] [blame] | 539 | struct xgene_enet_raw_desc *raw_desc, *exp_desc; |
Iyappan Subramanian | e6ad767 | 2014-08-07 15:14:28 -0700 | [diff] [blame] | 540 | u16 head = ring->head; |
| 541 | u16 slots = ring->slots - 1; |
Iyappan Subramanian | 9b00eb4 | 2015-08-26 11:48:06 -0700 | [diff] [blame] | 542 | int ret, count = 0, processed = 0; |
Iyappan Subramanian | e6ad767 | 2014-08-07 15:14:28 -0700 | [diff] [blame] | 543 | |
| 544 | do { |
| 545 | raw_desc = &ring->raw_desc[head]; |
Iyappan Subramanian | 9b00eb4 | 2015-08-26 11:48:06 -0700 | [diff] [blame] | 546 | exp_desc = NULL; |
Iyappan Subramanian | e6ad767 | 2014-08-07 15:14:28 -0700 | [diff] [blame] | 547 | if (unlikely(xgene_enet_is_desc_slot_empty(raw_desc))) |
| 548 | break; |
| 549 | |
Iyappan Subramanian | ecf6ba8 | 2015-01-29 14:38:23 -0800 | [diff] [blame] | 550 | /* read fpqnum field after dataaddr field */ |
| 551 | dma_rmb(); |
Iyappan Subramanian | 9b00eb4 | 2015-08-26 11:48:06 -0700 | [diff] [blame] | 552 | if (GET_BIT(NV, le64_to_cpu(raw_desc->m0))) { |
| 553 | head = (head + 1) & slots; |
| 554 | exp_desc = &ring->raw_desc[head]; |
| 555 | |
| 556 | if (unlikely(xgene_enet_is_desc_slot_empty(exp_desc))) { |
| 557 | head = (head - 1) & slots; |
| 558 | break; |
| 559 | } |
| 560 | dma_rmb(); |
| 561 | count++; |
| 562 | } |
Iyappan Subramanian | e6ad767 | 2014-08-07 15:14:28 -0700 | [diff] [blame] | 563 | if (is_rx_desc(raw_desc)) |
| 564 | ret = xgene_enet_rx_frame(ring, raw_desc); |
| 565 | else |
| 566 | ret = xgene_enet_tx_completion(ring, raw_desc); |
| 567 | xgene_enet_mark_desc_slot_empty(raw_desc); |
Iyappan Subramanian | 9b00eb4 | 2015-08-26 11:48:06 -0700 | [diff] [blame] | 568 | if (exp_desc) |
| 569 | xgene_enet_mark_desc_slot_empty(exp_desc); |
Iyappan Subramanian | e6ad767 | 2014-08-07 15:14:28 -0700 | [diff] [blame] | 570 | |
| 571 | head = (head + 1) & slots; |
| 572 | count++; |
Iyappan Subramanian | 9b00eb4 | 2015-08-26 11:48:06 -0700 | [diff] [blame] | 573 | processed++; |
Iyappan Subramanian | e6ad767 | 2014-08-07 15:14:28 -0700 | [diff] [blame] | 574 | |
| 575 | if (ret) |
| 576 | break; |
| 577 | } while (--budget); |
| 578 | |
| 579 | if (likely(count)) { |
Iyappan Subramanian | 81cefb8 | 2015-04-28 13:52:37 -0700 | [diff] [blame] | 580 | pdata->ring_ops->wr_cmd(ring, -count); |
Iyappan Subramanian | e6ad767 | 2014-08-07 15:14:28 -0700 | [diff] [blame] | 581 | ring->head = head; |
| 582 | |
| 583 | if (netif_queue_stopped(ring->ndev)) { |
Iyappan Subramanian | 81cefb8 | 2015-04-28 13:52:37 -0700 | [diff] [blame] | 584 | if (pdata->ring_ops->len(ring) < pdata->cp_qcnt_low) |
Iyappan Subramanian | e6ad767 | 2014-08-07 15:14:28 -0700 | [diff] [blame] | 585 | netif_wake_queue(ring->ndev); |
| 586 | } |
| 587 | } |
| 588 | |
Iyappan Subramanian | 9b00eb4 | 2015-08-26 11:48:06 -0700 | [diff] [blame] | 589 | return processed; |
Iyappan Subramanian | e6ad767 | 2014-08-07 15:14:28 -0700 | [diff] [blame] | 590 | } |
| 591 | |
| 592 | static int xgene_enet_napi(struct napi_struct *napi, const int budget) |
| 593 | { |
| 594 | struct xgene_enet_desc_ring *ring; |
| 595 | int processed; |
| 596 | |
| 597 | ring = container_of(napi, struct xgene_enet_desc_ring, napi); |
| 598 | processed = xgene_enet_process_ring(ring, budget); |
| 599 | |
| 600 | if (processed != budget) { |
| 601 | napi_complete(napi); |
| 602 | enable_irq(ring->irq); |
| 603 | } |
| 604 | |
| 605 | return processed; |
| 606 | } |
| 607 | |
| 608 | static void xgene_enet_timeout(struct net_device *ndev) |
| 609 | { |
| 610 | struct xgene_enet_pdata *pdata = netdev_priv(ndev); |
| 611 | |
Iyappan Subramanian | d0eb745 | 2014-10-09 18:32:05 -0700 | [diff] [blame] | 612 | pdata->mac_ops->reset(pdata); |
Iyappan Subramanian | e6ad767 | 2014-08-07 15:14:28 -0700 | [diff] [blame] | 613 | } |
| 614 | |
| 615 | static int xgene_enet_register_irq(struct net_device *ndev) |
| 616 | { |
| 617 | struct xgene_enet_pdata *pdata = netdev_priv(ndev); |
| 618 | struct device *dev = ndev_to_dev(ndev); |
Iyappan Subramanian | 6772b65 | 2015-03-25 12:19:12 -0700 | [diff] [blame] | 619 | struct xgene_enet_desc_ring *ring; |
Iyappan Subramanian | e6ad767 | 2014-08-07 15:14:28 -0700 | [diff] [blame] | 620 | int ret; |
| 621 | |
Iyappan Subramanian | 6772b65 | 2015-03-25 12:19:12 -0700 | [diff] [blame] | 622 | ring = pdata->rx_ring; |
| 623 | ret = devm_request_irq(dev, ring->irq, xgene_enet_rx_irq, |
| 624 | IRQF_SHARED, ring->irq_name, ring); |
| 625 | if (ret) |
| 626 | netdev_err(ndev, "Failed to request irq %s\n", ring->irq_name); |
| 627 | |
| 628 | if (pdata->cq_cnt) { |
| 629 | ring = pdata->tx_ring->cp_ring; |
| 630 | ret = devm_request_irq(dev, ring->irq, xgene_enet_rx_irq, |
| 631 | IRQF_SHARED, ring->irq_name, ring); |
| 632 | if (ret) { |
| 633 | netdev_err(ndev, "Failed to request irq %s\n", |
| 634 | ring->irq_name); |
| 635 | } |
Iyappan Subramanian | e6ad767 | 2014-08-07 15:14:28 -0700 | [diff] [blame] | 636 | } |
| 637 | |
| 638 | return ret; |
| 639 | } |
| 640 | |
| 641 | static void xgene_enet_free_irq(struct net_device *ndev) |
| 642 | { |
| 643 | struct xgene_enet_pdata *pdata; |
| 644 | struct device *dev; |
| 645 | |
| 646 | pdata = netdev_priv(ndev); |
| 647 | dev = ndev_to_dev(ndev); |
| 648 | devm_free_irq(dev, pdata->rx_ring->irq, pdata->rx_ring); |
Iyappan Subramanian | 6772b65 | 2015-03-25 12:19:12 -0700 | [diff] [blame] | 649 | |
| 650 | if (pdata->cq_cnt) { |
| 651 | devm_free_irq(dev, pdata->tx_ring->cp_ring->irq, |
| 652 | pdata->tx_ring->cp_ring); |
| 653 | } |
| 654 | } |
| 655 | |
| 656 | static void xgene_enet_napi_enable(struct xgene_enet_pdata *pdata) |
| 657 | { |
| 658 | struct napi_struct *napi; |
| 659 | |
| 660 | napi = &pdata->rx_ring->napi; |
| 661 | napi_enable(napi); |
| 662 | |
| 663 | if (pdata->cq_cnt) { |
| 664 | napi = &pdata->tx_ring->cp_ring->napi; |
| 665 | napi_enable(napi); |
| 666 | } |
| 667 | } |
| 668 | |
| 669 | static void xgene_enet_napi_disable(struct xgene_enet_pdata *pdata) |
| 670 | { |
| 671 | struct napi_struct *napi; |
| 672 | |
| 673 | napi = &pdata->rx_ring->napi; |
| 674 | napi_disable(napi); |
| 675 | |
| 676 | if (pdata->cq_cnt) { |
| 677 | napi = &pdata->tx_ring->cp_ring->napi; |
| 678 | napi_disable(napi); |
| 679 | } |
Iyappan Subramanian | e6ad767 | 2014-08-07 15:14:28 -0700 | [diff] [blame] | 680 | } |
| 681 | |
| 682 | static int xgene_enet_open(struct net_device *ndev) |
| 683 | { |
| 684 | struct xgene_enet_pdata *pdata = netdev_priv(ndev); |
Iyappan Subramanian | d0eb745 | 2014-10-09 18:32:05 -0700 | [diff] [blame] | 685 | struct xgene_mac_ops *mac_ops = pdata->mac_ops; |
Iyappan Subramanian | e6ad767 | 2014-08-07 15:14:28 -0700 | [diff] [blame] | 686 | int ret; |
| 687 | |
Iyappan Subramanian | d0eb745 | 2014-10-09 18:32:05 -0700 | [diff] [blame] | 688 | mac_ops->tx_enable(pdata); |
| 689 | mac_ops->rx_enable(pdata); |
Iyappan Subramanian | e6ad767 | 2014-08-07 15:14:28 -0700 | [diff] [blame] | 690 | |
Iyappan Subramanian | aeb20b6 | 2015-11-23 12:04:52 -0800 | [diff] [blame^] | 691 | xgene_enet_napi_enable(pdata); |
Iyappan Subramanian | e6ad767 | 2014-08-07 15:14:28 -0700 | [diff] [blame] | 692 | ret = xgene_enet_register_irq(ndev); |
| 693 | if (ret) |
| 694 | return ret; |
Iyappan Subramanian | e6ad767 | 2014-08-07 15:14:28 -0700 | [diff] [blame] | 695 | |
Iyappan Subramanian | 0148d38 | 2014-10-09 18:32:06 -0700 | [diff] [blame] | 696 | if (pdata->phy_mode == PHY_INTERFACE_MODE_RGMII) |
Iyappan Subramanian | e6ad767 | 2014-08-07 15:14:28 -0700 | [diff] [blame] | 697 | phy_start(pdata->phy_dev); |
Iyappan Subramanian | 0148d38 | 2014-10-09 18:32:06 -0700 | [diff] [blame] | 698 | else |
| 699 | schedule_delayed_work(&pdata->link_work, PHY_POLL_LINK_OFF); |
Iyappan Subramanian | e6ad767 | 2014-08-07 15:14:28 -0700 | [diff] [blame] | 700 | |
| 701 | netif_start_queue(ndev); |
| 702 | |
| 703 | return ret; |
| 704 | } |
| 705 | |
| 706 | static int xgene_enet_close(struct net_device *ndev) |
| 707 | { |
| 708 | struct xgene_enet_pdata *pdata = netdev_priv(ndev); |
Iyappan Subramanian | d0eb745 | 2014-10-09 18:32:05 -0700 | [diff] [blame] | 709 | struct xgene_mac_ops *mac_ops = pdata->mac_ops; |
Iyappan Subramanian | e6ad767 | 2014-08-07 15:14:28 -0700 | [diff] [blame] | 710 | |
| 711 | netif_stop_queue(ndev); |
| 712 | |
Iyappan Subramanian | 0148d38 | 2014-10-09 18:32:06 -0700 | [diff] [blame] | 713 | if (pdata->phy_mode == PHY_INTERFACE_MODE_RGMII) |
Iyappan Subramanian | e6ad767 | 2014-08-07 15:14:28 -0700 | [diff] [blame] | 714 | phy_stop(pdata->phy_dev); |
Iyappan Subramanian | 0148d38 | 2014-10-09 18:32:06 -0700 | [diff] [blame] | 715 | else |
| 716 | cancel_delayed_work_sync(&pdata->link_work); |
Iyappan Subramanian | e6ad767 | 2014-08-07 15:14:28 -0700 | [diff] [blame] | 717 | |
Iyappan Subramanian | d0eb745 | 2014-10-09 18:32:05 -0700 | [diff] [blame] | 718 | mac_ops->tx_disable(pdata); |
| 719 | mac_ops->rx_disable(pdata); |
Iyappan Subramanian | e6ad767 | 2014-08-07 15:14:28 -0700 | [diff] [blame] | 720 | |
Iyappan Subramanian | aeb20b6 | 2015-11-23 12:04:52 -0800 | [diff] [blame^] | 721 | xgene_enet_free_irq(ndev); |
| 722 | xgene_enet_napi_disable(pdata); |
| 723 | xgene_enet_process_ring(pdata->rx_ring, -1); |
| 724 | |
Iyappan Subramanian | e6ad767 | 2014-08-07 15:14:28 -0700 | [diff] [blame] | 725 | return 0; |
| 726 | } |
| 727 | |
| 728 | static void xgene_enet_delete_ring(struct xgene_enet_desc_ring *ring) |
| 729 | { |
| 730 | struct xgene_enet_pdata *pdata; |
| 731 | struct device *dev; |
| 732 | |
| 733 | pdata = netdev_priv(ring->ndev); |
| 734 | dev = ndev_to_dev(ring->ndev); |
| 735 | |
Iyappan Subramanian | 81cefb8 | 2015-04-28 13:52:37 -0700 | [diff] [blame] | 736 | pdata->ring_ops->clear(ring); |
Iyappan Subramanian | e6ad767 | 2014-08-07 15:14:28 -0700 | [diff] [blame] | 737 | dma_free_coherent(dev, ring->size, ring->desc_addr, ring->dma); |
| 738 | } |
| 739 | |
| 740 | static void xgene_enet_delete_desc_rings(struct xgene_enet_pdata *pdata) |
| 741 | { |
| 742 | struct xgene_enet_desc_ring *buf_pool; |
| 743 | |
| 744 | if (pdata->tx_ring) { |
| 745 | xgene_enet_delete_ring(pdata->tx_ring); |
| 746 | pdata->tx_ring = NULL; |
| 747 | } |
| 748 | |
| 749 | if (pdata->rx_ring) { |
| 750 | buf_pool = pdata->rx_ring->buf_pool; |
| 751 | xgene_enet_delete_bufpool(buf_pool); |
| 752 | xgene_enet_delete_ring(buf_pool); |
| 753 | xgene_enet_delete_ring(pdata->rx_ring); |
| 754 | pdata->rx_ring = NULL; |
| 755 | } |
| 756 | } |
| 757 | |
| 758 | static int xgene_enet_get_ring_size(struct device *dev, |
| 759 | enum xgene_enet_ring_cfgsize cfgsize) |
| 760 | { |
| 761 | int size = -EINVAL; |
| 762 | |
| 763 | switch (cfgsize) { |
| 764 | case RING_CFGSIZE_512B: |
| 765 | size = 0x200; |
| 766 | break; |
| 767 | case RING_CFGSIZE_2KB: |
| 768 | size = 0x800; |
| 769 | break; |
| 770 | case RING_CFGSIZE_16KB: |
| 771 | size = 0x4000; |
| 772 | break; |
| 773 | case RING_CFGSIZE_64KB: |
| 774 | size = 0x10000; |
| 775 | break; |
| 776 | case RING_CFGSIZE_512KB: |
| 777 | size = 0x80000; |
| 778 | break; |
| 779 | default: |
| 780 | dev_err(dev, "Unsupported cfg ring size %d\n", cfgsize); |
| 781 | break; |
| 782 | } |
| 783 | |
| 784 | return size; |
| 785 | } |
| 786 | |
| 787 | static void xgene_enet_free_desc_ring(struct xgene_enet_desc_ring *ring) |
| 788 | { |
Iyappan Subramanian | 81cefb8 | 2015-04-28 13:52:37 -0700 | [diff] [blame] | 789 | struct xgene_enet_pdata *pdata; |
Iyappan Subramanian | e6ad767 | 2014-08-07 15:14:28 -0700 | [diff] [blame] | 790 | struct device *dev; |
| 791 | |
| 792 | if (!ring) |
| 793 | return; |
| 794 | |
| 795 | dev = ndev_to_dev(ring->ndev); |
Iyappan Subramanian | 81cefb8 | 2015-04-28 13:52:37 -0700 | [diff] [blame] | 796 | pdata = netdev_priv(ring->ndev); |
Iyappan Subramanian | e6ad767 | 2014-08-07 15:14:28 -0700 | [diff] [blame] | 797 | |
| 798 | if (ring->desc_addr) { |
Iyappan Subramanian | 81cefb8 | 2015-04-28 13:52:37 -0700 | [diff] [blame] | 799 | pdata->ring_ops->clear(ring); |
Iyappan Subramanian | e6ad767 | 2014-08-07 15:14:28 -0700 | [diff] [blame] | 800 | dma_free_coherent(dev, ring->size, ring->desc_addr, ring->dma); |
| 801 | } |
| 802 | devm_kfree(dev, ring); |
| 803 | } |
| 804 | |
| 805 | static void xgene_enet_free_desc_rings(struct xgene_enet_pdata *pdata) |
| 806 | { |
| 807 | struct device *dev = &pdata->pdev->dev; |
| 808 | struct xgene_enet_desc_ring *ring; |
| 809 | |
| 810 | ring = pdata->tx_ring; |
Iyappan Subramanian | c10e4ca | 2014-08-21 13:44:48 -0700 | [diff] [blame] | 811 | if (ring) { |
| 812 | if (ring->cp_ring && ring->cp_ring->cp_skb) |
| 813 | devm_kfree(dev, ring->cp_ring->cp_skb); |
Iyappan Subramanian | 6772b65 | 2015-03-25 12:19:12 -0700 | [diff] [blame] | 814 | if (ring->cp_ring && pdata->cq_cnt) |
| 815 | xgene_enet_free_desc_ring(ring->cp_ring); |
Iyappan Subramanian | c10e4ca | 2014-08-21 13:44:48 -0700 | [diff] [blame] | 816 | xgene_enet_free_desc_ring(ring); |
| 817 | } |
Iyappan Subramanian | e6ad767 | 2014-08-07 15:14:28 -0700 | [diff] [blame] | 818 | |
| 819 | ring = pdata->rx_ring; |
Iyappan Subramanian | c10e4ca | 2014-08-21 13:44:48 -0700 | [diff] [blame] | 820 | if (ring) { |
| 821 | if (ring->buf_pool) { |
| 822 | if (ring->buf_pool->rx_skb) |
| 823 | devm_kfree(dev, ring->buf_pool->rx_skb); |
| 824 | xgene_enet_free_desc_ring(ring->buf_pool); |
| 825 | } |
| 826 | xgene_enet_free_desc_ring(ring); |
| 827 | } |
Iyappan Subramanian | e6ad767 | 2014-08-07 15:14:28 -0700 | [diff] [blame] | 828 | } |
| 829 | |
Iyappan Subramanian | bc1b7c1 | 2015-04-28 13:52:39 -0700 | [diff] [blame] | 830 | static bool is_irq_mbox_required(struct xgene_enet_pdata *pdata, |
| 831 | struct xgene_enet_desc_ring *ring) |
| 832 | { |
| 833 | if ((pdata->enet_id == XGENE_ENET2) && |
| 834 | (xgene_enet_ring_owner(ring->id) == RING_OWNER_CPU)) { |
| 835 | return true; |
| 836 | } |
| 837 | |
| 838 | return false; |
| 839 | } |
| 840 | |
| 841 | static void __iomem *xgene_enet_ring_cmd_base(struct xgene_enet_pdata *pdata, |
| 842 | struct xgene_enet_desc_ring *ring) |
| 843 | { |
| 844 | u8 num_ring_id_shift = pdata->ring_ops->num_ring_id_shift; |
| 845 | |
| 846 | return pdata->ring_cmd_addr + (ring->num << num_ring_id_shift); |
| 847 | } |
| 848 | |
Iyappan Subramanian | e6ad767 | 2014-08-07 15:14:28 -0700 | [diff] [blame] | 849 | static struct xgene_enet_desc_ring *xgene_enet_create_desc_ring( |
| 850 | struct net_device *ndev, u32 ring_num, |
| 851 | enum xgene_enet_ring_cfgsize cfgsize, u32 ring_id) |
| 852 | { |
| 853 | struct xgene_enet_desc_ring *ring; |
| 854 | struct xgene_enet_pdata *pdata = netdev_priv(ndev); |
| 855 | struct device *dev = ndev_to_dev(ndev); |
Tobias Klauser | 9b9ba82 | 2014-08-14 13:59:42 +0200 | [diff] [blame] | 856 | int size; |
| 857 | |
| 858 | size = xgene_enet_get_ring_size(dev, cfgsize); |
| 859 | if (size < 0) |
| 860 | return NULL; |
Iyappan Subramanian | e6ad767 | 2014-08-07 15:14:28 -0700 | [diff] [blame] | 861 | |
| 862 | ring = devm_kzalloc(dev, sizeof(struct xgene_enet_desc_ring), |
| 863 | GFP_KERNEL); |
| 864 | if (!ring) |
| 865 | return NULL; |
| 866 | |
| 867 | ring->ndev = ndev; |
| 868 | ring->num = ring_num; |
| 869 | ring->cfgsize = cfgsize; |
| 870 | ring->id = ring_id; |
| 871 | |
Iyappan Subramanian | e6ad767 | 2014-08-07 15:14:28 -0700 | [diff] [blame] | 872 | ring->desc_addr = dma_zalloc_coherent(dev, size, &ring->dma, |
| 873 | GFP_KERNEL); |
| 874 | if (!ring->desc_addr) { |
| 875 | devm_kfree(dev, ring); |
| 876 | return NULL; |
| 877 | } |
| 878 | ring->size = size; |
| 879 | |
Iyappan Subramanian | bc1b7c1 | 2015-04-28 13:52:39 -0700 | [diff] [blame] | 880 | if (is_irq_mbox_required(pdata, ring)) { |
| 881 | ring->irq_mbox_addr = dma_zalloc_coherent(dev, INTR_MBOX_SIZE, |
| 882 | &ring->irq_mbox_dma, GFP_KERNEL); |
| 883 | if (!ring->irq_mbox_addr) { |
| 884 | dma_free_coherent(dev, size, ring->desc_addr, |
| 885 | ring->dma); |
| 886 | devm_kfree(dev, ring); |
| 887 | return NULL; |
| 888 | } |
| 889 | } |
| 890 | |
| 891 | ring->cmd_base = xgene_enet_ring_cmd_base(pdata, ring); |
Iyappan Subramanian | e6ad767 | 2014-08-07 15:14:28 -0700 | [diff] [blame] | 892 | ring->cmd = ring->cmd_base + INC_DEC_CMD_ADDR; |
Iyappan Subramanian | 81cefb8 | 2015-04-28 13:52:37 -0700 | [diff] [blame] | 893 | ring = pdata->ring_ops->setup(ring); |
Iyappan Subramanian | e6ad767 | 2014-08-07 15:14:28 -0700 | [diff] [blame] | 894 | netdev_dbg(ndev, "ring info: num=%d size=%d id=%d slots=%d\n", |
| 895 | ring->num, ring->size, ring->id, ring->slots); |
| 896 | |
| 897 | return ring; |
| 898 | } |
| 899 | |
| 900 | static u16 xgene_enet_get_ring_id(enum xgene_ring_owner owner, u8 bufnum) |
| 901 | { |
| 902 | return (owner << 6) | (bufnum & GENMASK(5, 0)); |
| 903 | } |
| 904 | |
Iyappan Subramanian | bc1b7c1 | 2015-04-28 13:52:39 -0700 | [diff] [blame] | 905 | static enum xgene_ring_owner xgene_derive_ring_owner(struct xgene_enet_pdata *p) |
| 906 | { |
| 907 | enum xgene_ring_owner owner; |
| 908 | |
| 909 | if (p->enet_id == XGENE_ENET1) { |
| 910 | switch (p->phy_mode) { |
| 911 | case PHY_INTERFACE_MODE_SGMII: |
| 912 | owner = RING_OWNER_ETH0; |
| 913 | break; |
| 914 | default: |
| 915 | owner = (!p->port_id) ? RING_OWNER_ETH0 : |
| 916 | RING_OWNER_ETH1; |
| 917 | break; |
| 918 | } |
| 919 | } else { |
| 920 | owner = (!p->port_id) ? RING_OWNER_ETH0 : RING_OWNER_ETH1; |
| 921 | } |
| 922 | |
| 923 | return owner; |
| 924 | } |
| 925 | |
Iyappan Subramanian | e6ad767 | 2014-08-07 15:14:28 -0700 | [diff] [blame] | 926 | static int xgene_enet_create_desc_rings(struct net_device *ndev) |
| 927 | { |
| 928 | struct xgene_enet_pdata *pdata = netdev_priv(ndev); |
| 929 | struct device *dev = ndev_to_dev(ndev); |
| 930 | struct xgene_enet_desc_ring *rx_ring, *tx_ring, *cp_ring; |
| 931 | struct xgene_enet_desc_ring *buf_pool = NULL; |
Iyappan Subramanian | bc1b7c1 | 2015-04-28 13:52:39 -0700 | [diff] [blame] | 932 | enum xgene_ring_owner owner; |
Iyappan Subramanian | 9b00eb4 | 2015-08-26 11:48:06 -0700 | [diff] [blame] | 933 | dma_addr_t dma_exp_bufs; |
Keyur Chudgar | ca62645 | 2015-03-17 11:27:13 -0700 | [diff] [blame] | 934 | u8 cpu_bufnum = pdata->cpu_bufnum; |
| 935 | u8 eth_bufnum = pdata->eth_bufnum; |
| 936 | u8 bp_bufnum = pdata->bp_bufnum; |
| 937 | u16 ring_num = pdata->ring_num; |
| 938 | u16 ring_id; |
Iyappan Subramanian | 9b00eb4 | 2015-08-26 11:48:06 -0700 | [diff] [blame] | 939 | int ret, size; |
Iyappan Subramanian | e6ad767 | 2014-08-07 15:14:28 -0700 | [diff] [blame] | 940 | |
| 941 | /* allocate rx descriptor ring */ |
Iyappan Subramanian | bc1b7c1 | 2015-04-28 13:52:39 -0700 | [diff] [blame] | 942 | owner = xgene_derive_ring_owner(pdata); |
Iyappan Subramanian | e6ad767 | 2014-08-07 15:14:28 -0700 | [diff] [blame] | 943 | ring_id = xgene_enet_get_ring_id(RING_OWNER_CPU, cpu_bufnum++); |
| 944 | rx_ring = xgene_enet_create_desc_ring(ndev, ring_num++, |
| 945 | RING_CFGSIZE_16KB, ring_id); |
| 946 | if (!rx_ring) { |
| 947 | ret = -ENOMEM; |
| 948 | goto err; |
| 949 | } |
| 950 | |
| 951 | /* allocate buffer pool for receiving packets */ |
Iyappan Subramanian | bc1b7c1 | 2015-04-28 13:52:39 -0700 | [diff] [blame] | 952 | owner = xgene_derive_ring_owner(pdata); |
| 953 | ring_id = xgene_enet_get_ring_id(owner, bp_bufnum++); |
Iyappan Subramanian | e6ad767 | 2014-08-07 15:14:28 -0700 | [diff] [blame] | 954 | buf_pool = xgene_enet_create_desc_ring(ndev, ring_num++, |
| 955 | RING_CFGSIZE_2KB, ring_id); |
| 956 | if (!buf_pool) { |
| 957 | ret = -ENOMEM; |
| 958 | goto err; |
| 959 | } |
| 960 | |
| 961 | rx_ring->nbufpool = NUM_BUFPOOL; |
| 962 | rx_ring->buf_pool = buf_pool; |
| 963 | rx_ring->irq = pdata->rx_irq; |
Iyappan Subramanian | 6772b65 | 2015-03-25 12:19:12 -0700 | [diff] [blame] | 964 | if (!pdata->cq_cnt) { |
| 965 | snprintf(rx_ring->irq_name, IRQ_ID_SIZE, "%s-rx-txc", |
| 966 | ndev->name); |
| 967 | } else { |
| 968 | snprintf(rx_ring->irq_name, IRQ_ID_SIZE, "%s-rx", ndev->name); |
| 969 | } |
Iyappan Subramanian | e6ad767 | 2014-08-07 15:14:28 -0700 | [diff] [blame] | 970 | buf_pool->rx_skb = devm_kcalloc(dev, buf_pool->slots, |
| 971 | sizeof(struct sk_buff *), GFP_KERNEL); |
| 972 | if (!buf_pool->rx_skb) { |
| 973 | ret = -ENOMEM; |
| 974 | goto err; |
| 975 | } |
| 976 | |
| 977 | buf_pool->dst_ring_num = xgene_enet_dst_ring_num(buf_pool); |
| 978 | rx_ring->buf_pool = buf_pool; |
| 979 | pdata->rx_ring = rx_ring; |
| 980 | |
| 981 | /* allocate tx descriptor ring */ |
Iyappan Subramanian | bc1b7c1 | 2015-04-28 13:52:39 -0700 | [diff] [blame] | 982 | owner = xgene_derive_ring_owner(pdata); |
| 983 | ring_id = xgene_enet_get_ring_id(owner, eth_bufnum++); |
Iyappan Subramanian | e6ad767 | 2014-08-07 15:14:28 -0700 | [diff] [blame] | 984 | tx_ring = xgene_enet_create_desc_ring(ndev, ring_num++, |
| 985 | RING_CFGSIZE_16KB, ring_id); |
| 986 | if (!tx_ring) { |
| 987 | ret = -ENOMEM; |
| 988 | goto err; |
| 989 | } |
Iyappan Subramanian | 9b00eb4 | 2015-08-26 11:48:06 -0700 | [diff] [blame] | 990 | |
| 991 | size = (tx_ring->slots / 2) * sizeof(__le64) * MAX_EXP_BUFFS; |
| 992 | tx_ring->exp_bufs = dma_zalloc_coherent(dev, size, &dma_exp_bufs, |
| 993 | GFP_KERNEL); |
| 994 | if (!tx_ring->exp_bufs) { |
| 995 | ret = -ENOMEM; |
| 996 | goto err; |
| 997 | } |
| 998 | |
Iyappan Subramanian | e6ad767 | 2014-08-07 15:14:28 -0700 | [diff] [blame] | 999 | pdata->tx_ring = tx_ring; |
| 1000 | |
Iyappan Subramanian | 6772b65 | 2015-03-25 12:19:12 -0700 | [diff] [blame] | 1001 | if (!pdata->cq_cnt) { |
| 1002 | cp_ring = pdata->rx_ring; |
| 1003 | } else { |
| 1004 | /* allocate tx completion descriptor ring */ |
| 1005 | ring_id = xgene_enet_get_ring_id(RING_OWNER_CPU, cpu_bufnum++); |
| 1006 | cp_ring = xgene_enet_create_desc_ring(ndev, ring_num++, |
| 1007 | RING_CFGSIZE_16KB, |
| 1008 | ring_id); |
| 1009 | if (!cp_ring) { |
| 1010 | ret = -ENOMEM; |
| 1011 | goto err; |
| 1012 | } |
| 1013 | cp_ring->irq = pdata->txc_irq; |
| 1014 | snprintf(cp_ring->irq_name, IRQ_ID_SIZE, "%s-txc", ndev->name); |
| 1015 | } |
| 1016 | |
Iyappan Subramanian | e6ad767 | 2014-08-07 15:14:28 -0700 | [diff] [blame] | 1017 | cp_ring->cp_skb = devm_kcalloc(dev, tx_ring->slots, |
| 1018 | sizeof(struct sk_buff *), GFP_KERNEL); |
| 1019 | if (!cp_ring->cp_skb) { |
| 1020 | ret = -ENOMEM; |
| 1021 | goto err; |
| 1022 | } |
Iyappan Subramanian | 9b00eb4 | 2015-08-26 11:48:06 -0700 | [diff] [blame] | 1023 | |
| 1024 | size = sizeof(dma_addr_t) * MAX_SKB_FRAGS; |
| 1025 | cp_ring->frag_dma_addr = devm_kcalloc(dev, tx_ring->slots, |
| 1026 | size, GFP_KERNEL); |
| 1027 | if (!cp_ring->frag_dma_addr) { |
| 1028 | devm_kfree(dev, cp_ring->cp_skb); |
| 1029 | ret = -ENOMEM; |
| 1030 | goto err; |
| 1031 | } |
| 1032 | |
Iyappan Subramanian | e6ad767 | 2014-08-07 15:14:28 -0700 | [diff] [blame] | 1033 | pdata->tx_ring->cp_ring = cp_ring; |
| 1034 | pdata->tx_ring->dst_ring_num = xgene_enet_dst_ring_num(cp_ring); |
| 1035 | |
| 1036 | pdata->tx_qcnt_hi = pdata->tx_ring->slots / 2; |
| 1037 | pdata->cp_qcnt_hi = pdata->rx_ring->slots / 2; |
| 1038 | pdata->cp_qcnt_low = pdata->cp_qcnt_hi / 2; |
| 1039 | |
| 1040 | return 0; |
| 1041 | |
| 1042 | err: |
| 1043 | xgene_enet_free_desc_rings(pdata); |
| 1044 | return ret; |
| 1045 | } |
| 1046 | |
| 1047 | static struct rtnl_link_stats64 *xgene_enet_get_stats64( |
| 1048 | struct net_device *ndev, |
| 1049 | struct rtnl_link_stats64 *storage) |
| 1050 | { |
| 1051 | struct xgene_enet_pdata *pdata = netdev_priv(ndev); |
| 1052 | struct rtnl_link_stats64 *stats = &pdata->stats; |
| 1053 | |
| 1054 | stats->rx_errors += stats->rx_length_errors + |
| 1055 | stats->rx_crc_errors + |
| 1056 | stats->rx_frame_errors + |
| 1057 | stats->rx_fifo_errors; |
| 1058 | memcpy(storage, &pdata->stats, sizeof(struct rtnl_link_stats64)); |
| 1059 | |
| 1060 | return storage; |
| 1061 | } |
| 1062 | |
| 1063 | static int xgene_enet_set_mac_address(struct net_device *ndev, void *addr) |
| 1064 | { |
| 1065 | struct xgene_enet_pdata *pdata = netdev_priv(ndev); |
| 1066 | int ret; |
| 1067 | |
| 1068 | ret = eth_mac_addr(ndev, addr); |
| 1069 | if (ret) |
| 1070 | return ret; |
Iyappan Subramanian | d0eb745 | 2014-10-09 18:32:05 -0700 | [diff] [blame] | 1071 | pdata->mac_ops->set_mac_addr(pdata); |
Iyappan Subramanian | e6ad767 | 2014-08-07 15:14:28 -0700 | [diff] [blame] | 1072 | |
| 1073 | return ret; |
| 1074 | } |
| 1075 | |
| 1076 | static const struct net_device_ops xgene_ndev_ops = { |
| 1077 | .ndo_open = xgene_enet_open, |
| 1078 | .ndo_stop = xgene_enet_close, |
| 1079 | .ndo_start_xmit = xgene_enet_start_xmit, |
| 1080 | .ndo_tx_timeout = xgene_enet_timeout, |
| 1081 | .ndo_get_stats64 = xgene_enet_get_stats64, |
| 1082 | .ndo_change_mtu = eth_change_mtu, |
| 1083 | .ndo_set_mac_address = xgene_enet_set_mac_address, |
| 1084 | }; |
| 1085 | |
Stephen Rothwell | 8beeef8 | 2015-06-24 17:29:51 +1000 | [diff] [blame] | 1086 | #ifdef CONFIG_ACPI |
Suman Tripathi | 0738c54 | 2015-06-23 14:47:14 +0530 | [diff] [blame] | 1087 | static int xgene_get_port_id_acpi(struct device *dev, |
| 1088 | struct xgene_enet_pdata *pdata) |
| 1089 | { |
| 1090 | acpi_status status; |
| 1091 | u64 temp; |
| 1092 | |
| 1093 | status = acpi_evaluate_integer(ACPI_HANDLE(dev), "_SUN", NULL, &temp); |
| 1094 | if (ACPI_FAILURE(status)) { |
| 1095 | pdata->port_id = 0; |
| 1096 | } else { |
| 1097 | pdata->port_id = temp; |
| 1098 | } |
| 1099 | |
| 1100 | return 0; |
| 1101 | } |
Stephen Rothwell | 8beeef8 | 2015-06-24 17:29:51 +1000 | [diff] [blame] | 1102 | #endif |
Suman Tripathi | 0738c54 | 2015-06-23 14:47:14 +0530 | [diff] [blame] | 1103 | |
| 1104 | static int xgene_get_port_id_dt(struct device *dev, struct xgene_enet_pdata *pdata) |
Keyur Chudgar | ca62645 | 2015-03-17 11:27:13 -0700 | [diff] [blame] | 1105 | { |
| 1106 | u32 id = 0; |
| 1107 | int ret; |
| 1108 | |
Suman Tripathi | 0738c54 | 2015-06-23 14:47:14 +0530 | [diff] [blame] | 1109 | ret = of_property_read_u32(dev->of_node, "port-id", &id); |
| 1110 | if (ret) { |
Iyappan Subramanian | 561fea6 | 2015-04-28 13:52:40 -0700 | [diff] [blame] | 1111 | pdata->port_id = 0; |
| 1112 | ret = 0; |
Suman Tripathi | 0738c54 | 2015-06-23 14:47:14 +0530 | [diff] [blame] | 1113 | } else { |
Iyappan Subramanian | 561fea6 | 2015-04-28 13:52:40 -0700 | [diff] [blame] | 1114 | pdata->port_id = id & BIT(0); |
Keyur Chudgar | ca62645 | 2015-03-17 11:27:13 -0700 | [diff] [blame] | 1115 | } |
| 1116 | |
Iyappan Subramanian | 561fea6 | 2015-04-28 13:52:40 -0700 | [diff] [blame] | 1117 | return ret; |
Keyur Chudgar | ca62645 | 2015-03-17 11:27:13 -0700 | [diff] [blame] | 1118 | } |
| 1119 | |
Iyappan Subramanian | 16615a4c | 2015-10-26 15:25:15 -0700 | [diff] [blame] | 1120 | static int xgene_get_tx_delay(struct xgene_enet_pdata *pdata) |
| 1121 | { |
| 1122 | struct device *dev = &pdata->pdev->dev; |
| 1123 | int delay, ret; |
| 1124 | |
| 1125 | ret = of_property_read_u32(dev->of_node, "tx-delay", &delay); |
| 1126 | if (ret) { |
| 1127 | pdata->tx_delay = 4; |
| 1128 | return 0; |
| 1129 | } |
| 1130 | |
| 1131 | if (delay < 0 || delay > 7) { |
| 1132 | dev_err(dev, "Invalid tx-delay specified\n"); |
| 1133 | return -EINVAL; |
| 1134 | } |
| 1135 | |
| 1136 | pdata->tx_delay = delay; |
| 1137 | |
| 1138 | return 0; |
| 1139 | } |
| 1140 | |
| 1141 | static int xgene_get_rx_delay(struct xgene_enet_pdata *pdata) |
| 1142 | { |
| 1143 | struct device *dev = &pdata->pdev->dev; |
| 1144 | int delay, ret; |
| 1145 | |
| 1146 | ret = of_property_read_u32(dev->of_node, "rx-delay", &delay); |
| 1147 | if (ret) { |
| 1148 | pdata->rx_delay = 2; |
| 1149 | return 0; |
| 1150 | } |
| 1151 | |
| 1152 | if (delay < 0 || delay > 7) { |
| 1153 | dev_err(dev, "Invalid rx-delay specified\n"); |
| 1154 | return -EINVAL; |
| 1155 | } |
| 1156 | |
| 1157 | pdata->rx_delay = delay; |
| 1158 | |
| 1159 | return 0; |
| 1160 | } |
Feng Kan | de7b5b3d | 2015-01-06 15:41:33 -0700 | [diff] [blame] | 1161 | |
Iyappan Subramanian | e6ad767 | 2014-08-07 15:14:28 -0700 | [diff] [blame] | 1162 | static int xgene_enet_get_resources(struct xgene_enet_pdata *pdata) |
| 1163 | { |
| 1164 | struct platform_device *pdev; |
| 1165 | struct net_device *ndev; |
| 1166 | struct device *dev; |
| 1167 | struct resource *res; |
| 1168 | void __iomem *base_addr; |
Iyappan Subramanian | 561fea6 | 2015-04-28 13:52:40 -0700 | [diff] [blame] | 1169 | u32 offset; |
Geert Uytterhoeven | 2e59871 | 2015-06-25 15:13:29 +0200 | [diff] [blame] | 1170 | int ret = 0; |
Iyappan Subramanian | e6ad767 | 2014-08-07 15:14:28 -0700 | [diff] [blame] | 1171 | |
| 1172 | pdev = pdata->pdev; |
| 1173 | dev = &pdev->dev; |
| 1174 | ndev = pdata->ndev; |
| 1175 | |
Feng Kan | de7b5b3d | 2015-01-06 15:41:33 -0700 | [diff] [blame] | 1176 | res = platform_get_resource(pdev, IORESOURCE_MEM, RES_ENET_CSR); |
| 1177 | if (!res) { |
| 1178 | dev_err(dev, "Resource enet_csr not defined\n"); |
| 1179 | return -ENODEV; |
| 1180 | } |
| 1181 | pdata->base_addr = devm_ioremap(dev, res->start, resource_size(res)); |
Dan Carpenter | 3ec7a17 | 2015-01-08 13:52:12 +0300 | [diff] [blame] | 1182 | if (!pdata->base_addr) { |
Iyappan Subramanian | e6ad767 | 2014-08-07 15:14:28 -0700 | [diff] [blame] | 1183 | dev_err(dev, "Unable to retrieve ENET Port CSR region\n"); |
Dan Carpenter | 3ec7a17 | 2015-01-08 13:52:12 +0300 | [diff] [blame] | 1184 | return -ENOMEM; |
Iyappan Subramanian | e6ad767 | 2014-08-07 15:14:28 -0700 | [diff] [blame] | 1185 | } |
| 1186 | |
Feng Kan | de7b5b3d | 2015-01-06 15:41:33 -0700 | [diff] [blame] | 1187 | res = platform_get_resource(pdev, IORESOURCE_MEM, RES_RING_CSR); |
| 1188 | if (!res) { |
| 1189 | dev_err(dev, "Resource ring_csr not defined\n"); |
| 1190 | return -ENODEV; |
| 1191 | } |
| 1192 | pdata->ring_csr_addr = devm_ioremap(dev, res->start, |
| 1193 | resource_size(res)); |
Dan Carpenter | 3ec7a17 | 2015-01-08 13:52:12 +0300 | [diff] [blame] | 1194 | if (!pdata->ring_csr_addr) { |
Iyappan Subramanian | e6ad767 | 2014-08-07 15:14:28 -0700 | [diff] [blame] | 1195 | dev_err(dev, "Unable to retrieve ENET Ring CSR region\n"); |
Dan Carpenter | 3ec7a17 | 2015-01-08 13:52:12 +0300 | [diff] [blame] | 1196 | return -ENOMEM; |
Iyappan Subramanian | e6ad767 | 2014-08-07 15:14:28 -0700 | [diff] [blame] | 1197 | } |
| 1198 | |
Feng Kan | de7b5b3d | 2015-01-06 15:41:33 -0700 | [diff] [blame] | 1199 | res = platform_get_resource(pdev, IORESOURCE_MEM, RES_RING_CMD); |
| 1200 | if (!res) { |
| 1201 | dev_err(dev, "Resource ring_cmd not defined\n"); |
| 1202 | return -ENODEV; |
| 1203 | } |
| 1204 | pdata->ring_cmd_addr = devm_ioremap(dev, res->start, |
| 1205 | resource_size(res)); |
Dan Carpenter | 3ec7a17 | 2015-01-08 13:52:12 +0300 | [diff] [blame] | 1206 | if (!pdata->ring_cmd_addr) { |
Iyappan Subramanian | e6ad767 | 2014-08-07 15:14:28 -0700 | [diff] [blame] | 1207 | dev_err(dev, "Unable to retrieve ENET Ring command region\n"); |
Dan Carpenter | 3ec7a17 | 2015-01-08 13:52:12 +0300 | [diff] [blame] | 1208 | return -ENOMEM; |
Iyappan Subramanian | e6ad767 | 2014-08-07 15:14:28 -0700 | [diff] [blame] | 1209 | } |
| 1210 | |
Suman Tripathi | 0738c54 | 2015-06-23 14:47:14 +0530 | [diff] [blame] | 1211 | if (dev->of_node) |
| 1212 | ret = xgene_get_port_id_dt(dev, pdata); |
| 1213 | #ifdef CONFIG_ACPI |
| 1214 | else |
| 1215 | ret = xgene_get_port_id_acpi(dev, pdata); |
| 1216 | #endif |
Keyur Chudgar | ca62645 | 2015-03-17 11:27:13 -0700 | [diff] [blame] | 1217 | if (ret) |
| 1218 | return ret; |
| 1219 | |
Jeremy Linton | 938049e | 2015-08-19 13:56:42 -0500 | [diff] [blame] | 1220 | if (!device_get_mac_address(dev, ndev->dev_addr, ETH_ALEN)) |
Iyappan Subramanian | e6ad767 | 2014-08-07 15:14:28 -0700 | [diff] [blame] | 1221 | eth_hw_addr_random(ndev); |
Feng Kan | de7b5b3d | 2015-01-06 15:41:33 -0700 | [diff] [blame] | 1222 | |
Iyappan Subramanian | e6ad767 | 2014-08-07 15:14:28 -0700 | [diff] [blame] | 1223 | memcpy(ndev->perm_addr, ndev->dev_addr, ndev->addr_len); |
| 1224 | |
Jeremy Linton | 938049e | 2015-08-19 13:56:42 -0500 | [diff] [blame] | 1225 | pdata->phy_mode = device_get_phy_mode(dev); |
Iyappan Subramanian | e6ad767 | 2014-08-07 15:14:28 -0700 | [diff] [blame] | 1226 | if (pdata->phy_mode < 0) { |
Iyappan Subramanian | 0148d38 | 2014-10-09 18:32:06 -0700 | [diff] [blame] | 1227 | dev_err(dev, "Unable to get phy-connection-type\n"); |
| 1228 | return pdata->phy_mode; |
| 1229 | } |
| 1230 | if (pdata->phy_mode != PHY_INTERFACE_MODE_RGMII && |
Iyappan Subramanian | 32f784b | 2014-10-13 17:05:34 -0700 | [diff] [blame] | 1231 | pdata->phy_mode != PHY_INTERFACE_MODE_SGMII && |
Iyappan Subramanian | 0148d38 | 2014-10-09 18:32:06 -0700 | [diff] [blame] | 1232 | pdata->phy_mode != PHY_INTERFACE_MODE_XGMII) { |
| 1233 | dev_err(dev, "Incorrect phy-connection-type specified\n"); |
| 1234 | return -ENODEV; |
Iyappan Subramanian | e6ad767 | 2014-08-07 15:14:28 -0700 | [diff] [blame] | 1235 | } |
| 1236 | |
Iyappan Subramanian | 16615a4c | 2015-10-26 15:25:15 -0700 | [diff] [blame] | 1237 | ret = xgene_get_tx_delay(pdata); |
| 1238 | if (ret) |
| 1239 | return ret; |
| 1240 | |
| 1241 | ret = xgene_get_rx_delay(pdata); |
| 1242 | if (ret) |
| 1243 | return ret; |
| 1244 | |
Iyappan Subramanian | 6772b65 | 2015-03-25 12:19:12 -0700 | [diff] [blame] | 1245 | ret = platform_get_irq(pdev, 0); |
| 1246 | if (ret <= 0) { |
| 1247 | dev_err(dev, "Unable to get ENET Rx IRQ\n"); |
| 1248 | ret = ret ? : -ENXIO; |
| 1249 | return ret; |
| 1250 | } |
| 1251 | pdata->rx_irq = ret; |
| 1252 | |
| 1253 | if (pdata->phy_mode != PHY_INTERFACE_MODE_RGMII) { |
| 1254 | ret = platform_get_irq(pdev, 1); |
| 1255 | if (ret <= 0) { |
Suman Tripathi | 2c7be0a | 2015-06-23 14:47:15 +0530 | [diff] [blame] | 1256 | pdata->cq_cnt = 0; |
| 1257 | dev_info(dev, "Unable to get Tx completion IRQ," |
| 1258 | "using Rx IRQ instead\n"); |
| 1259 | } else { |
| 1260 | pdata->cq_cnt = XGENE_MAX_TXC_RINGS; |
| 1261 | pdata->txc_irq = ret; |
Iyappan Subramanian | 6772b65 | 2015-03-25 12:19:12 -0700 | [diff] [blame] | 1262 | } |
Iyappan Subramanian | 6772b65 | 2015-03-25 12:19:12 -0700 | [diff] [blame] | 1263 | } |
| 1264 | |
Iyappan Subramanian | e6ad767 | 2014-08-07 15:14:28 -0700 | [diff] [blame] | 1265 | pdata->clk = devm_clk_get(&pdev->dev, NULL); |
Iyappan Subramanian | e6ad767 | 2014-08-07 15:14:28 -0700 | [diff] [blame] | 1266 | if (IS_ERR(pdata->clk)) { |
Feng Kan | de7b5b3d | 2015-01-06 15:41:33 -0700 | [diff] [blame] | 1267 | /* Firmware may have set up the clock already. */ |
Suman Tripathi | c2d33bd | 2015-06-23 14:47:17 +0530 | [diff] [blame] | 1268 | dev_info(dev, "clocks have been setup already\n"); |
Iyappan Subramanian | e6ad767 | 2014-08-07 15:14:28 -0700 | [diff] [blame] | 1269 | } |
| 1270 | |
Iyappan Subramanian | bc1b7c1 | 2015-04-28 13:52:39 -0700 | [diff] [blame] | 1271 | if (pdata->phy_mode != PHY_INTERFACE_MODE_XGMII) |
| 1272 | base_addr = pdata->base_addr - (pdata->port_id * MAC_OFFSET); |
| 1273 | else |
| 1274 | base_addr = pdata->base_addr; |
Iyappan Subramanian | e6ad767 | 2014-08-07 15:14:28 -0700 | [diff] [blame] | 1275 | pdata->eth_csr_addr = base_addr + BLOCK_ETH_CSR_OFFSET; |
| 1276 | pdata->eth_ring_if_addr = base_addr + BLOCK_ETH_RING_IF_OFFSET; |
| 1277 | pdata->eth_diag_csr_addr = base_addr + BLOCK_ETH_DIAG_CSR_OFFSET; |
Iyappan Subramanian | 32f784b | 2014-10-13 17:05:34 -0700 | [diff] [blame] | 1278 | if (pdata->phy_mode == PHY_INTERFACE_MODE_RGMII || |
| 1279 | pdata->phy_mode == PHY_INTERFACE_MODE_SGMII) { |
Keyur Chudgar | ca62645 | 2015-03-17 11:27:13 -0700 | [diff] [blame] | 1280 | pdata->mcx_mac_addr = pdata->base_addr + BLOCK_ETH_MAC_OFFSET; |
Iyappan Subramanian | 561fea6 | 2015-04-28 13:52:40 -0700 | [diff] [blame] | 1281 | offset = (pdata->enet_id == XGENE_ENET1) ? |
| 1282 | BLOCK_ETH_MAC_CSR_OFFSET : |
| 1283 | X2_BLOCK_ETH_MAC_CSR_OFFSET; |
| 1284 | pdata->mcx_mac_csr_addr = base_addr + offset; |
Iyappan Subramanian | 0148d38 | 2014-10-09 18:32:06 -0700 | [diff] [blame] | 1285 | } else { |
| 1286 | pdata->mcx_mac_addr = base_addr + BLOCK_AXG_MAC_OFFSET; |
| 1287 | pdata->mcx_mac_csr_addr = base_addr + BLOCK_AXG_MAC_CSR_OFFSET; |
Iyappan Subramanian | 0148d38 | 2014-10-09 18:32:06 -0700 | [diff] [blame] | 1288 | } |
Iyappan Subramanian | e6ad767 | 2014-08-07 15:14:28 -0700 | [diff] [blame] | 1289 | pdata->rx_buff_cnt = NUM_PKT_BUF; |
| 1290 | |
Iyappan Subramanian | 0148d38 | 2014-10-09 18:32:06 -0700 | [diff] [blame] | 1291 | return 0; |
Iyappan Subramanian | e6ad767 | 2014-08-07 15:14:28 -0700 | [diff] [blame] | 1292 | } |
| 1293 | |
| 1294 | static int xgene_enet_init_hw(struct xgene_enet_pdata *pdata) |
| 1295 | { |
| 1296 | struct net_device *ndev = pdata->ndev; |
| 1297 | struct xgene_enet_desc_ring *buf_pool; |
| 1298 | u16 dst_ring_num; |
| 1299 | int ret; |
| 1300 | |
Iyappan Subramanian | c3f4465 | 2014-11-03 11:59:55 -0800 | [diff] [blame] | 1301 | ret = pdata->port_ops->reset(pdata); |
| 1302 | if (ret) |
| 1303 | return ret; |
Iyappan Subramanian | e6ad767 | 2014-08-07 15:14:28 -0700 | [diff] [blame] | 1304 | |
| 1305 | ret = xgene_enet_create_desc_rings(ndev); |
| 1306 | if (ret) { |
| 1307 | netdev_err(ndev, "Error in ring configuration\n"); |
| 1308 | return ret; |
| 1309 | } |
| 1310 | |
| 1311 | /* setup buffer pool */ |
| 1312 | buf_pool = pdata->rx_ring->buf_pool; |
| 1313 | xgene_enet_init_bufpool(buf_pool); |
| 1314 | ret = xgene_enet_refill_bufpool(buf_pool, pdata->rx_buff_cnt); |
| 1315 | if (ret) { |
| 1316 | xgene_enet_delete_desc_rings(pdata); |
| 1317 | return ret; |
| 1318 | } |
| 1319 | |
| 1320 | dst_ring_num = xgene_enet_dst_ring_num(pdata->rx_ring); |
Iyappan Subramanian | d0eb745 | 2014-10-09 18:32:05 -0700 | [diff] [blame] | 1321 | pdata->port_ops->cle_bypass(pdata, dst_ring_num, buf_pool->id); |
Iyappan Subramanian | 0148d38 | 2014-10-09 18:32:06 -0700 | [diff] [blame] | 1322 | pdata->mac_ops->init(pdata); |
Iyappan Subramanian | e6ad767 | 2014-08-07 15:14:28 -0700 | [diff] [blame] | 1323 | |
| 1324 | return ret; |
| 1325 | } |
| 1326 | |
Iyappan Subramanian | d0eb745 | 2014-10-09 18:32:05 -0700 | [diff] [blame] | 1327 | static void xgene_enet_setup_ops(struct xgene_enet_pdata *pdata) |
| 1328 | { |
Iyappan Subramanian | 0148d38 | 2014-10-09 18:32:06 -0700 | [diff] [blame] | 1329 | switch (pdata->phy_mode) { |
| 1330 | case PHY_INTERFACE_MODE_RGMII: |
| 1331 | pdata->mac_ops = &xgene_gmac_ops; |
| 1332 | pdata->port_ops = &xgene_gport_ops; |
Iyappan Subramanian | dc8385f | 2014-10-13 17:05:33 -0700 | [diff] [blame] | 1333 | pdata->rm = RM3; |
Iyappan Subramanian | 0148d38 | 2014-10-09 18:32:06 -0700 | [diff] [blame] | 1334 | break; |
Iyappan Subramanian | 32f784b | 2014-10-13 17:05:34 -0700 | [diff] [blame] | 1335 | case PHY_INTERFACE_MODE_SGMII: |
| 1336 | pdata->mac_ops = &xgene_sgmac_ops; |
| 1337 | pdata->port_ops = &xgene_sgport_ops; |
| 1338 | pdata->rm = RM1; |
| 1339 | break; |
Iyappan Subramanian | 0148d38 | 2014-10-09 18:32:06 -0700 | [diff] [blame] | 1340 | default: |
| 1341 | pdata->mac_ops = &xgene_xgmac_ops; |
| 1342 | pdata->port_ops = &xgene_xgport_ops; |
Iyappan Subramanian | dc8385f | 2014-10-13 17:05:33 -0700 | [diff] [blame] | 1343 | pdata->rm = RM0; |
Iyappan Subramanian | 0148d38 | 2014-10-09 18:32:06 -0700 | [diff] [blame] | 1344 | break; |
| 1345 | } |
Keyur Chudgar | ca62645 | 2015-03-17 11:27:13 -0700 | [diff] [blame] | 1346 | |
Iyappan Subramanian | bc1b7c1 | 2015-04-28 13:52:39 -0700 | [diff] [blame] | 1347 | if (pdata->enet_id == XGENE_ENET1) { |
| 1348 | switch (pdata->port_id) { |
| 1349 | case 0: |
| 1350 | pdata->cpu_bufnum = START_CPU_BUFNUM_0; |
| 1351 | pdata->eth_bufnum = START_ETH_BUFNUM_0; |
| 1352 | pdata->bp_bufnum = START_BP_BUFNUM_0; |
| 1353 | pdata->ring_num = START_RING_NUM_0; |
| 1354 | break; |
| 1355 | case 1: |
Iyappan Subramanian | 149e9ab | 2015-09-08 15:50:26 -0700 | [diff] [blame] | 1356 | if (pdata->phy_mode == PHY_INTERFACE_MODE_XGMII) { |
| 1357 | pdata->cpu_bufnum = XG_START_CPU_BUFNUM_1; |
| 1358 | pdata->eth_bufnum = XG_START_ETH_BUFNUM_1; |
| 1359 | pdata->bp_bufnum = XG_START_BP_BUFNUM_1; |
| 1360 | pdata->ring_num = XG_START_RING_NUM_1; |
| 1361 | } else { |
| 1362 | pdata->cpu_bufnum = START_CPU_BUFNUM_1; |
| 1363 | pdata->eth_bufnum = START_ETH_BUFNUM_1; |
| 1364 | pdata->bp_bufnum = START_BP_BUFNUM_1; |
| 1365 | pdata->ring_num = START_RING_NUM_1; |
| 1366 | } |
Iyappan Subramanian | bc1b7c1 | 2015-04-28 13:52:39 -0700 | [diff] [blame] | 1367 | break; |
| 1368 | default: |
| 1369 | break; |
| 1370 | } |
| 1371 | pdata->ring_ops = &xgene_ring1_ops; |
| 1372 | } else { |
| 1373 | switch (pdata->port_id) { |
| 1374 | case 0: |
| 1375 | pdata->cpu_bufnum = X2_START_CPU_BUFNUM_0; |
| 1376 | pdata->eth_bufnum = X2_START_ETH_BUFNUM_0; |
| 1377 | pdata->bp_bufnum = X2_START_BP_BUFNUM_0; |
| 1378 | pdata->ring_num = X2_START_RING_NUM_0; |
| 1379 | break; |
| 1380 | case 1: |
| 1381 | pdata->cpu_bufnum = X2_START_CPU_BUFNUM_1; |
| 1382 | pdata->eth_bufnum = X2_START_ETH_BUFNUM_1; |
| 1383 | pdata->bp_bufnum = X2_START_BP_BUFNUM_1; |
| 1384 | pdata->ring_num = X2_START_RING_NUM_1; |
| 1385 | break; |
| 1386 | default: |
| 1387 | break; |
| 1388 | } |
| 1389 | pdata->rm = RM0; |
| 1390 | pdata->ring_ops = &xgene_ring2_ops; |
Keyur Chudgar | ca62645 | 2015-03-17 11:27:13 -0700 | [diff] [blame] | 1391 | } |
Iyappan Subramanian | d0eb745 | 2014-10-09 18:32:05 -0700 | [diff] [blame] | 1392 | } |
| 1393 | |
Iyappan Subramanian | 6772b65 | 2015-03-25 12:19:12 -0700 | [diff] [blame] | 1394 | static void xgene_enet_napi_add(struct xgene_enet_pdata *pdata) |
| 1395 | { |
| 1396 | struct napi_struct *napi; |
| 1397 | |
| 1398 | napi = &pdata->rx_ring->napi; |
| 1399 | netif_napi_add(pdata->ndev, napi, xgene_enet_napi, NAPI_POLL_WEIGHT); |
| 1400 | |
| 1401 | if (pdata->cq_cnt) { |
| 1402 | napi = &pdata->tx_ring->cp_ring->napi; |
| 1403 | netif_napi_add(pdata->ndev, napi, xgene_enet_napi, |
| 1404 | NAPI_POLL_WEIGHT); |
| 1405 | } |
| 1406 | } |
| 1407 | |
| 1408 | static void xgene_enet_napi_del(struct xgene_enet_pdata *pdata) |
| 1409 | { |
| 1410 | struct napi_struct *napi; |
| 1411 | |
| 1412 | napi = &pdata->rx_ring->napi; |
| 1413 | netif_napi_del(napi); |
| 1414 | |
| 1415 | if (pdata->cq_cnt) { |
| 1416 | napi = &pdata->tx_ring->cp_ring->napi; |
| 1417 | netif_napi_del(napi); |
| 1418 | } |
| 1419 | } |
| 1420 | |
Iyappan Subramanian | e6ad767 | 2014-08-07 15:14:28 -0700 | [diff] [blame] | 1421 | static int xgene_enet_probe(struct platform_device *pdev) |
| 1422 | { |
| 1423 | struct net_device *ndev; |
| 1424 | struct xgene_enet_pdata *pdata; |
| 1425 | struct device *dev = &pdev->dev; |
Iyappan Subramanian | dc8385f | 2014-10-13 17:05:33 -0700 | [diff] [blame] | 1426 | struct xgene_mac_ops *mac_ops; |
Iyappan Subramanian | bc1b7c1 | 2015-04-28 13:52:39 -0700 | [diff] [blame] | 1427 | const struct of_device_id *of_id; |
Iyappan Subramanian | e6ad767 | 2014-08-07 15:14:28 -0700 | [diff] [blame] | 1428 | int ret; |
| 1429 | |
| 1430 | ndev = alloc_etherdev(sizeof(struct xgene_enet_pdata)); |
| 1431 | if (!ndev) |
| 1432 | return -ENOMEM; |
| 1433 | |
| 1434 | pdata = netdev_priv(ndev); |
| 1435 | |
| 1436 | pdata->pdev = pdev; |
| 1437 | pdata->ndev = ndev; |
| 1438 | SET_NETDEV_DEV(ndev, dev); |
| 1439 | platform_set_drvdata(pdev, pdata); |
| 1440 | ndev->netdev_ops = &xgene_ndev_ops; |
| 1441 | xgene_enet_set_ethtool_ops(ndev); |
| 1442 | ndev->features |= NETIF_F_IP_CSUM | |
| 1443 | NETIF_F_GSO | |
Iyappan Subramanian | 9b00eb4 | 2015-08-26 11:48:06 -0700 | [diff] [blame] | 1444 | NETIF_F_GRO | |
| 1445 | NETIF_F_SG; |
Iyappan Subramanian | e6ad767 | 2014-08-07 15:14:28 -0700 | [diff] [blame] | 1446 | |
Iyappan Subramanian | bc1b7c1 | 2015-04-28 13:52:39 -0700 | [diff] [blame] | 1447 | of_id = of_match_device(xgene_enet_of_match, &pdev->dev); |
| 1448 | if (of_id) { |
| 1449 | pdata->enet_id = (enum xgene_enet_id)of_id->data; |
Suman Tripathi | 0738c54 | 2015-06-23 14:47:14 +0530 | [diff] [blame] | 1450 | } |
| 1451 | #ifdef CONFIG_ACPI |
| 1452 | else { |
| 1453 | const struct acpi_device_id *acpi_id; |
| 1454 | |
| 1455 | acpi_id = acpi_match_device(xgene_enet_acpi_match, &pdev->dev); |
| 1456 | if (acpi_id) |
| 1457 | pdata->enet_id = (enum xgene_enet_id) acpi_id->driver_data; |
Iyappan Subramanian | bc1b7c1 | 2015-04-28 13:52:39 -0700 | [diff] [blame] | 1458 | } |
| 1459 | #endif |
Suman Tripathi | 0738c54 | 2015-06-23 14:47:14 +0530 | [diff] [blame] | 1460 | if (!pdata->enet_id) { |
| 1461 | free_netdev(ndev); |
| 1462 | return -ENODEV; |
| 1463 | } |
Iyappan Subramanian | bc1b7c1 | 2015-04-28 13:52:39 -0700 | [diff] [blame] | 1464 | |
Iyappan Subramanian | e6ad767 | 2014-08-07 15:14:28 -0700 | [diff] [blame] | 1465 | ret = xgene_enet_get_resources(pdata); |
| 1466 | if (ret) |
| 1467 | goto err; |
| 1468 | |
Iyappan Subramanian | d0eb745 | 2014-10-09 18:32:05 -0700 | [diff] [blame] | 1469 | xgene_enet_setup_ops(pdata); |
Iyappan Subramanian | e6ad767 | 2014-08-07 15:14:28 -0700 | [diff] [blame] | 1470 | |
Iyappan Subramanian | 9b00eb4 | 2015-08-26 11:48:06 -0700 | [diff] [blame] | 1471 | if (pdata->phy_mode == PHY_INTERFACE_MODE_XGMII) { |
| 1472 | ndev->features |= NETIF_F_TSO; |
| 1473 | pdata->mss = XGENE_ENET_MSS; |
| 1474 | } |
| 1475 | ndev->hw_features = ndev->features; |
| 1476 | |
Feng Kan | de7b5b3d | 2015-01-06 15:41:33 -0700 | [diff] [blame] | 1477 | ret = dma_coerce_mask_and_coherent(dev, DMA_BIT_MASK(64)); |
Iyappan Subramanian | e6ad767 | 2014-08-07 15:14:28 -0700 | [diff] [blame] | 1478 | if (ret) { |
| 1479 | netdev_err(ndev, "No usable DMA configuration\n"); |
| 1480 | goto err; |
| 1481 | } |
| 1482 | |
Iyappan Subramanian | aeb20b6 | 2015-11-23 12:04:52 -0800 | [diff] [blame^] | 1483 | ret = register_netdev(ndev); |
| 1484 | if (ret) { |
| 1485 | netdev_err(ndev, "Failed to register netdev\n"); |
| 1486 | goto err; |
| 1487 | } |
| 1488 | |
Iyappan Subramanian | e6ad767 | 2014-08-07 15:14:28 -0700 | [diff] [blame] | 1489 | ret = xgene_enet_init_hw(pdata); |
| 1490 | if (ret) |
| 1491 | goto err; |
| 1492 | |
Iyappan Subramanian | dc8385f | 2014-10-13 17:05:33 -0700 | [diff] [blame] | 1493 | mac_ops = pdata->mac_ops; |
Iyappan Subramanian | aeb20b6 | 2015-11-23 12:04:52 -0800 | [diff] [blame^] | 1494 | if (pdata->phy_mode == PHY_INTERFACE_MODE_RGMII) { |
Iyappan Subramanian | 0148d38 | 2014-10-09 18:32:06 -0700 | [diff] [blame] | 1495 | ret = xgene_enet_mdio_config(pdata); |
Iyappan Subramanian | aeb20b6 | 2015-11-23 12:04:52 -0800 | [diff] [blame^] | 1496 | if (ret) |
| 1497 | goto err; |
| 1498 | } else { |
Iyappan Subramanian | dc8385f | 2014-10-13 17:05:33 -0700 | [diff] [blame] | 1499 | INIT_DELAYED_WORK(&pdata->link_work, mac_ops->link_state); |
Iyappan Subramanian | aeb20b6 | 2015-11-23 12:04:52 -0800 | [diff] [blame^] | 1500 | } |
Iyappan Subramanian | e6ad767 | 2014-08-07 15:14:28 -0700 | [diff] [blame] | 1501 | |
Iyappan Subramanian | aeb20b6 | 2015-11-23 12:04:52 -0800 | [diff] [blame^] | 1502 | xgene_enet_napi_add(pdata); |
| 1503 | return 0; |
Iyappan Subramanian | e6ad767 | 2014-08-07 15:14:28 -0700 | [diff] [blame] | 1504 | err: |
Iyappan Subramanian | c3f4465 | 2014-11-03 11:59:55 -0800 | [diff] [blame] | 1505 | unregister_netdev(ndev); |
Iyappan Subramanian | e6ad767 | 2014-08-07 15:14:28 -0700 | [diff] [blame] | 1506 | free_netdev(ndev); |
| 1507 | return ret; |
| 1508 | } |
| 1509 | |
| 1510 | static int xgene_enet_remove(struct platform_device *pdev) |
| 1511 | { |
| 1512 | struct xgene_enet_pdata *pdata; |
Iyappan Subramanian | d0eb745 | 2014-10-09 18:32:05 -0700 | [diff] [blame] | 1513 | struct xgene_mac_ops *mac_ops; |
Iyappan Subramanian | e6ad767 | 2014-08-07 15:14:28 -0700 | [diff] [blame] | 1514 | struct net_device *ndev; |
| 1515 | |
| 1516 | pdata = platform_get_drvdata(pdev); |
Iyappan Subramanian | d0eb745 | 2014-10-09 18:32:05 -0700 | [diff] [blame] | 1517 | mac_ops = pdata->mac_ops; |
Iyappan Subramanian | e6ad767 | 2014-08-07 15:14:28 -0700 | [diff] [blame] | 1518 | ndev = pdata->ndev; |
| 1519 | |
Iyappan Subramanian | d0eb745 | 2014-10-09 18:32:05 -0700 | [diff] [blame] | 1520 | mac_ops->rx_disable(pdata); |
| 1521 | mac_ops->tx_disable(pdata); |
Iyappan Subramanian | e6ad767 | 2014-08-07 15:14:28 -0700 | [diff] [blame] | 1522 | |
Iyappan Subramanian | 6772b65 | 2015-03-25 12:19:12 -0700 | [diff] [blame] | 1523 | xgene_enet_napi_del(pdata); |
Iyappan Subramanian | ccc02dd | 2015-08-25 15:03:03 -0700 | [diff] [blame] | 1524 | if (pdata->phy_mode == PHY_INTERFACE_MODE_RGMII) |
| 1525 | xgene_enet_mdio_remove(pdata); |
Iyappan Subramanian | e6ad767 | 2014-08-07 15:14:28 -0700 | [diff] [blame] | 1526 | unregister_netdev(ndev); |
Iyappan Subramanian | ccc02dd | 2015-08-25 15:03:03 -0700 | [diff] [blame] | 1527 | xgene_enet_delete_desc_rings(pdata); |
Iyappan Subramanian | d0eb745 | 2014-10-09 18:32:05 -0700 | [diff] [blame] | 1528 | pdata->port_ops->shutdown(pdata); |
Iyappan Subramanian | e6ad767 | 2014-08-07 15:14:28 -0700 | [diff] [blame] | 1529 | free_netdev(ndev); |
| 1530 | |
| 1531 | return 0; |
| 1532 | } |
| 1533 | |
Feng Kan | de7b5b3d | 2015-01-06 15:41:33 -0700 | [diff] [blame] | 1534 | #ifdef CONFIG_ACPI |
| 1535 | static const struct acpi_device_id xgene_enet_acpi_match[] = { |
Suman Tripathi | 0738c54 | 2015-06-23 14:47:14 +0530 | [diff] [blame] | 1536 | { "APMC0D05", XGENE_ENET1}, |
| 1537 | { "APMC0D30", XGENE_ENET1}, |
| 1538 | { "APMC0D31", XGENE_ENET1}, |
Iyappan Subramanian | 149e9ab | 2015-09-08 15:50:26 -0700 | [diff] [blame] | 1539 | { "APMC0D3F", XGENE_ENET1}, |
Suman Tripathi | 822e34a | 2015-06-23 14:47:16 +0530 | [diff] [blame] | 1540 | { "APMC0D26", XGENE_ENET2}, |
| 1541 | { "APMC0D25", XGENE_ENET2}, |
Feng Kan | de7b5b3d | 2015-01-06 15:41:33 -0700 | [diff] [blame] | 1542 | { } |
| 1543 | }; |
| 1544 | MODULE_DEVICE_TABLE(acpi, xgene_enet_acpi_match); |
| 1545 | #endif |
| 1546 | |
Geert Uytterhoeven | 163cff3 | 2015-02-11 11:25:40 +0100 | [diff] [blame] | 1547 | #ifdef CONFIG_OF |
Fabian Frederick | a6b0dc2 | 2015-03-17 19:37:36 +0100 | [diff] [blame] | 1548 | static const struct of_device_id xgene_enet_of_match[] = { |
Iyappan Subramanian | bc1b7c1 | 2015-04-28 13:52:39 -0700 | [diff] [blame] | 1549 | {.compatible = "apm,xgene-enet", .data = (void *)XGENE_ENET1}, |
| 1550 | {.compatible = "apm,xgene1-sgenet", .data = (void *)XGENE_ENET1}, |
| 1551 | {.compatible = "apm,xgene1-xgenet", .data = (void *)XGENE_ENET1}, |
Iyappan Subramanian | 561fea6 | 2015-04-28 13:52:40 -0700 | [diff] [blame] | 1552 | {.compatible = "apm,xgene2-sgenet", .data = (void *)XGENE_ENET2}, |
Iyappan Subramanian | bc1b7c1 | 2015-04-28 13:52:39 -0700 | [diff] [blame] | 1553 | {.compatible = "apm,xgene2-xgenet", .data = (void *)XGENE_ENET2}, |
Iyappan Subramanian | e6ad767 | 2014-08-07 15:14:28 -0700 | [diff] [blame] | 1554 | {}, |
| 1555 | }; |
| 1556 | |
Feng Kan | de7b5b3d | 2015-01-06 15:41:33 -0700 | [diff] [blame] | 1557 | MODULE_DEVICE_TABLE(of, xgene_enet_of_match); |
Geert Uytterhoeven | 163cff3 | 2015-02-11 11:25:40 +0100 | [diff] [blame] | 1558 | #endif |
Iyappan Subramanian | e6ad767 | 2014-08-07 15:14:28 -0700 | [diff] [blame] | 1559 | |
| 1560 | static struct platform_driver xgene_enet_driver = { |
| 1561 | .driver = { |
| 1562 | .name = "xgene-enet", |
Feng Kan | de7b5b3d | 2015-01-06 15:41:33 -0700 | [diff] [blame] | 1563 | .of_match_table = of_match_ptr(xgene_enet_of_match), |
| 1564 | .acpi_match_table = ACPI_PTR(xgene_enet_acpi_match), |
Iyappan Subramanian | e6ad767 | 2014-08-07 15:14:28 -0700 | [diff] [blame] | 1565 | }, |
| 1566 | .probe = xgene_enet_probe, |
| 1567 | .remove = xgene_enet_remove, |
| 1568 | }; |
| 1569 | |
| 1570 | module_platform_driver(xgene_enet_driver); |
| 1571 | |
| 1572 | MODULE_DESCRIPTION("APM X-Gene SoC Ethernet driver"); |
| 1573 | MODULE_VERSION(XGENE_DRV_VERSION); |
Iyappan Subramanian | d0eb745 | 2014-10-09 18:32:05 -0700 | [diff] [blame] | 1574 | MODULE_AUTHOR("Iyappan Subramanian <isubramanian@apm.com>"); |
Iyappan Subramanian | e6ad767 | 2014-08-07 15:14:28 -0700 | [diff] [blame] | 1575 | MODULE_AUTHOR("Keyur Chudgar <kchudgar@apm.com>"); |
| 1576 | MODULE_LICENSE("GPL"); |